C PROGRAMMING
TUTORIAL
By Ms. P. P. Jaini
OUTLINE
 Overview
 History
 Features
 Role of C Compiler
 Flowchart
 Sample C Program 1
 Character Set
 Data Types...
OVERVIEW OF C
 C language is
 Structured
 High level
 Machine independent
 Follows top down approach
3
HISTORY
 ALGOL
 In 1960’s
 First language using a block structure
 BCPL
 In 1967
 Basic Combined Programming Languag...
CONTD…
 C
Evolved from ALGOL, BCPL & B
Developed between 1969 and 1973 along with Unix
Developed at AT & T’s Bell Labo...
FEATURES
 C is PortableThis means a program written for
one computer may run successfully on other
computer also.
 C is ...
CONTD…
 Simple / Easy
The C Language has both the simplicity of High Level
Language and speed of Low Level Language. So i...
ROLE OF C COMPILER
Compiler: converts source to object code for a specific
platform
Linker: resolves external references...
FLOWCHART
 Flow charts are symbolic diagrams of operations
and the sequence, data flow, control flow and
processing logic...
CONTD…
Advantages of flowchart:-
 It provides an easy way of communication
because any other person besides the
programme...
CONTD…
 It checks the accuracy in logic flow.
 It documents the steps followed in an algorithm.
 It provides the facili...
FLOWCHART SYMBOLS
12
CONTD…
 Terminator
This symbol represents the beginning and end
point in a program. We use start and stop option
in it.
...
CONTD…
 Decision Symbol
It is used when we want to take any decision in
the program.
 Connector Symbol
This symbol is us...
SAMPLE C PROGRAM
main() --------------Function name
{ ------------Start of Program
….
…. -------- Program statements
….
} ...
CONTD…
#include <stdio.h>
void main ( )
{
printf ( “Hello, World!n);
}
#include <stdio.h>
int main ( void )
{
printf ( “He...
17
FLOWCHART FOR HELLO.C
int main ()
{
printf("Hello, world!n");
}
An oval denotes either
the start or the end of
the prog...
CONTD…
 Comments
Text surrounded by /* and */ is ignored by computer
Used to describe program
 int main()
Program’s e...
CONTD…
o Preprocessor directives
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#include <string.h>
 The #incl...
CONTD…
 These files contain information about some library
functions used in the program:
stdio stands for “standard I/O...
CONTD…
#define MAX_COLS 20
#define MAX_INPUT 1000
 The #define directives perform “global replacements”:
every instance ...
CONTD…
 commonly used stdio.h functions:
printf() – Output function
Syntax:
printf(“….”) ;
scanf() – Input function
S...
CONTD…
 commonly used conio.h functions:
clrscr()
Used to clear the screen
getch()
Used to get a character from ouput...
CHARACTER SET
These are the characters that C recognizes.
 Letters (upper case and lower case)
A B C D E F G H I J K L M
...
CONTD…
 256 characters are allowed in C.
A – Z : 65 to 90 26
a – z : 97 to 122 26
0 – 9 : 48 to 57 10
Special symbols...
DATA TYPES
1] Primary
 Integer
 Float
 Double
 Character
2] Derived
 Arrays
 Pointers
 Structure
o C support severa...
CONTD…
 Primary Data Types
Data Types Byte Format Specifier
1] char 1 %c
signed char 1 %c
unsigned char 1 %c
2] short 2 %...
CONTD…
Data Types Byte Format Specifier
4] long 4 %l
long signed int 4 %ld
long unsigned int 4 %lu
5] float 4 %f
signed fl...
TYPE CASTING
 It is used to convert on data at a time.
 We can have two types of type casting.
 Implicit
 Explicit
 I...
CONTD…
#include <stdio.h>
void main ( )
{
int base, height, area;
base = 5;
height =3;
area = (base * height)/2;
printf ( ...
CONTD…
#include <stdio.h>
void main ( )
{
int base, height, area;
base = 5;
height = 3;
area = ((float) (base * height)/2)...
USER DEFINED DATA TYPE
[A] Type Definition
Allows user to define an identifier that would
represent an existing data type...
CONTD…
[B] Enumerated data type
 Syntax: enum identifier { value1, value2...
valuen}
 Eg: enum day{ Monday, Tuesday, Wed...
VARIABLES
 Variable names correspond to locations in the computer's
memory
 Data name that may be used to store a data v...
CONTD…
 Rules
Must begin with a letter(), some system permits
underscore as first character.
Length should be not more ...
C IS CASE SENSITIVE
C is case sensitive: it distinguishes between UPPER case
(CAPITAL) and lower case (small) letters.
Key...
C TOKENS
 Keywords
 Identifiers
 Constants
 Strings
 Special Symbol
 Operators
37
CONTD…
Keywords
auto double int struct
break else long switch
case enum register typedef
char extern return union
const fl...
CONTD…
 Constants
Quantity that does not change is called a constant.
Types
Numeric constants
Integer constants – 123...
CONTD…
Backslash Characters Constants
 n – Newline
 b – Backspace
 f – Form feed
 t – Tab or horizontal tab
 a – Audi...
CONTD…
 Identifiers
Names of arrays, function and variable
 Operators
Arithmetic
Relational
Logical
Bitwise
41
ARITHMETIC OPERATORS
C operation Arithmetic
operator
Algebraic
expression
C expression
Addition + f + 7 f + 7
Subtraction ...
CONTD….
 Equality and Relational Operators
Standard algebraic
equality operator or
relational operator
C equality or
rela...
CONTD….
 Logical Operators:
&& logical And
|| logical Or
! logical Not
 Bitwise Operators
 & bitwise And
 | bitwise...
SAMPLE C PROGRAM 2
/* Program for multiplication of two variables */
#include< stdio.h>
#include < conio.h>
void main()
{
...
CONTD…
 OUTPUT:
Enter two numbers: 12 3
Multiplication of two numbers is 36
46
CONTROL STATEMENTS
 These statements are used to control the flow of
program by using these statements. We can have
four ...
DECISION MAKING
 These statements are used when we want to take
any decision according to the condition or user
requireme...
 if
if statement is simple decision making statement,
which is used to take any decision when the
condition is true.
if (...
CONTD….
 If-else
This statement is used to make decision in C
language. If the given condition is true then the
cursor wi...
 If else-if
if (condition)
{
Statement;
}
else if (condition)
{
Statement;
}
else if (condition)
{
Statement;
}
else
{
St...
SWITCH CASE / SELECT CASE
 These statements are used with the replacement
of if-else and these statements are used when w...
 Syntax:
switch( expression)
{
case value-1:
block-1;
break;
case value-2:
block-2;
break;
----
default:
default-block;
b...
LOOPING
 These statements are used to control the flow of
the program and repeat any process multiple
times according to ...
CONTD…
While
 It is an entry control loop statement, because it
checks the condition first and then if the
condition is t...
CONTD…
Do-while
 Do-while loop is also called exit control loop.
 It is different from while loop because in this
loop t...
CONTD…
 SYNTAX:-
Initialization
do
{
Statement;
Increment / decrement;
}
while (condition)
57
CONTD….
For loop
 It is another looping statement or construct used
to repeat any process according to user
requirement b...
CONTD….
for (initialization; Test condition; Increment /
decrement)
{
Statement;
}
…………………………………….
for (; test condition; ...
CONTD….
for (; test condition;)
{
Statement;
Increment / decrement
}
60
JUMPS STATEMENTS
 These are also called as branching statements.
 These statements transfer control to another part
of t...
CONTD…
 Continue
This statement is used within the body of the
loop. The continue statement moves control in
the beginnin...
CONTD…
clrscr ( );
for (a=1; a<=10; a++)
{
if (a= =5 | | a= = 7)
continue;
printf (“%d n”,a);
}
getch ( );
}
63
CONTD…
Break
 This statement is used to terminate any
sequence or sequence of statement in switch
statement. This stateme...
CONTD…
int a;
clrscr ( );
for (a=1; a<=10; a++)
{
if (a= =5)
break;
printf (“%d n”,a);
}
getch ( );
} 65
CONTD…
Goto statement
 It is used to alter or modify the normal sequence
of program execution by transferring the control...
CONTD…
 Backward Loop:
label:
statement
….
….
goto label;
67
COMMON PROGRAMMING
ERRORS
 Missing Semicolons
Eg: a = x+y …… is wrong
c= b/d; …… is right
 Misuse of Semicolon
Eg:
for...
CONTD…
 Use of = instead of = =
 Missing Braces
 Missing Quotes
 Improper Comment Characters
 Undeclared Variables
A...
ASSIGNMENT
 Write a C program to swap two entered number.
 Write a C program to perform all the arithmetic
operations.
...
CONTD…
 Write a C program to display the greatest of
three number using if else statement.
 Write a C program to find th...
 Write a C program to display the entered letter
is vowel or a character.
 Write a C program to display odd number from ...
QUERIES?
73
THANK YOU!!!
74
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Introduction to c programming

  1. 1. C PROGRAMMING TUTORIAL By Ms. P. P. Jaini
  2. 2. OUTLINE  Overview  History  Features  Role of C Compiler  Flowchart  Sample C Program 1  Character Set  Data Types  Variables  C is Case Sensitive  C Token  Sample C Program 2  Control Statements  Common Programming Errors  Assignment 2
  3. 3. OVERVIEW OF C  C language is  Structured  High level  Machine independent  Follows top down approach 3
  4. 4. HISTORY  ALGOL  In 1960’s  First language using a block structure  BCPL  In 1967  Basic Combined Programming Language  B  In 1970  Added feature of BCPL 4
  5. 5. CONTD…  C Evolved from ALGOL, BCPL & B Developed between 1969 and 1973 along with Unix Developed at AT & T’s Bell Laboratories of USA Designed and written by Dennis Ritchie 5
  6. 6. FEATURES  C is PortableThis means a program written for one computer may run successfully on other computer also.  C is fast This means that the executable program obtained after compiling and linking runs very fast.  C is compact The statements in C Language are generally short but very powerful. 6
  7. 7. CONTD…  Simple / Easy The C Language has both the simplicity of High Level Language and speed of Low Level Language. So it is also known as Middle Level Language  C has only 32 Keywords  C Compiler is easily available  C has ability to extend itself. Users can add their own functions to the C Library 7
  8. 8. ROLE OF C COMPILER Compiler: converts source to object code for a specific platform Linker: resolves external references and produces the executable module  Typically C programs when executing, have four different files Source Code – file that is created by user and the executable statements are written. This file is saved with a file extension of ‘.c’. Header files – contains the declaration of functions and pre- processors statements. Header files have ‘.h’ as their extension. Object files – are the output from the compilers. ‘.o’ or ‘.obj’ are the typical extension to such files. Binary executables – are an output of the process of linking. Binary executables have ‘.exe’ as their extension. 8
  9. 9. FLOWCHART  Flow charts are symbolic diagrams of operations and the sequence, data flow, control flow and processing logic in information processing.  These charts are used to understand any working sequence of the program.  Flow char is a graphical representation of algorithm. I  An algorithm defines as the step by step procedure or method that can be carried out for solving programming problems. 9
  10. 10. CONTD… Advantages of flowchart:-  It provides an easy way of communication because any other person besides the programmer can understand the way they are represented.  It represents the data flow.  It provides a clear overview of the entire program and problem and solution. 10
  11. 11. CONTD…  It checks the accuracy in logic flow.  It documents the steps followed in an algorithm.  It provides the facility for coding.  It provides the way of modification of running program.  They shows all major elements and their relationship. 11
  12. 12. FLOWCHART SYMBOLS 12
  13. 13. CONTD…  Terminator This symbol represents the beginning and end point in a program. We use start and stop option in it.  Input / Output Symbol This symbol is used to take any input or output in the algorithm.  Process Symbol A rectangle indicates the processing, calculation and arithmetic operations 13
  14. 14. CONTD…  Decision Symbol It is used when we want to take any decision in the program.  Connector Symbol This symbol is used to connect the various portion of a flow chart. This is normally used when the flow chart is split between two pages  Data Flow Symbol This symbol is used to display the flow of the program. It shows the path of logic flow in a program. 14
  15. 15. SAMPLE C PROGRAM main() --------------Function name { ------------Start of Program …. …. -------- Program statements …. } --------------- End of Program 15
  16. 16. CONTD… #include <stdio.h> void main ( ) { printf ( “Hello, World!n); } #include <stdio.h> int main ( void ) { printf ( “Hello, World!n” ) ; return 0 ; } /* Filename : hello.c Description : This program prints the greeting “Hello, World!” */ 16
  17. 17. 17 FLOWCHART FOR HELLO.C int main () { printf("Hello, world!n"); } An oval denotes either the start or the end of the program, or a halt operation within the program (which we’ll learn about later). A parallelogram denotes either an input operation or an output operation. An arrow denotes the flow of the program. Start End Output “Hello, world!”
  18. 18. CONTD…  Comments Text surrounded by /* and */ is ignored by computer Used to describe program  int main() Program’s execution starts from the main function Parenthesis used to indicate a function int means that main "returns" an integer value Braces ({ and }) indicate a block The bodies of all functions must be contained in braces 18
  19. 19. CONTD… o Preprocessor directives #include <stdio.h> #include <conio.h> #include <stdlib.h> #include <string.h>  The #include directives “paste” the contents of the files like stdio.h and conio.h into your source code, at the very place where the directives appear. 19
  20. 20. CONTD…  These files contain information about some library functions used in the program: stdio stands for “standard I/O”, conio stands for “console I/O” stdlib stands for “standard library”, string.h includes useful string manipulation functions.  Want to see the files? Look in /TC/include 20
  21. 21. CONTD… #define MAX_COLS 20 #define MAX_INPUT 1000  The #define directives perform “global replacements”: every instance of MAX_COLS is replaced with 20, and every instance of MAX_INPUT is replaced with 1000 21
  22. 22. CONTD…  commonly used stdio.h functions: printf() – Output function Syntax: printf(“….”) ; scanf() – Input function Syntax: scanf(“format specifier”, &var,&var2…); 22
  23. 23. CONTD…  commonly used conio.h functions: clrscr() Used to clear the screen getch() Used to get a character from ouput screen to come into the edit screen. 23
  24. 24. CHARACTER SET These are the characters that C recognizes.  Letters (upper case and lower case) A B C D E F G H I J K L M N O P Q R S T U V W X Y Z a b c d e f g h i j k l m n o p q r s t u v w x y z  Digits 0 1 2 3 4 5 6 7 8 9  Special Characters (punctuation etc) space (also known as blank) ’ " ( ) * + - / : = ! & $ ; < > % ? , . ˆ # @ ˜ ‘ { } [ ] | 24
  25. 25. CONTD…  256 characters are allowed in C. A – Z : 65 to 90 26 a – z : 97 to 122 26 0 – 9 : 48 to 57 10 Special symbols[ #, &, `…] 32 Control characters[n, t . ..] 34 Graphic characters 128 Total 256 25
  26. 26. DATA TYPES 1] Primary  Integer  Float  Double  Character 2] Derived  Arrays  Pointers  Structure o C support several different types of data, which may be represented differently within the computers memory. o Types 3] User Defined  typedef  enum 26
  27. 27. CONTD…  Primary Data Types Data Types Byte Format Specifier 1] char 1 %c signed char 1 %c unsigned char 1 %c 2] short 2 %d short signed int 2 %d short unsigned int 2 %u 3] int 2 %d signed int 2 %d unsigned int 2 %u 27
  28. 28. CONTD… Data Types Byte Format Specifier 4] long 4 %l long signed int 4 %ld long unsigned int 4 %lu 5] float 4 %f signed float 4 %f unsigned float 4 %uf 6] double 8 %lf 7] Long Double 10 %Lf 28
  29. 29. TYPE CASTING  It is used to convert on data at a time.  We can have two types of type casting.  Implicit  Explicit  Implicit : This converts narrow type to wider type so that use can avoid the information to the system.  Explicit : Explicit type casting is done by the programmer manually. When the programmer wants a result of an expression to be in particular type, then we use explicit type casting. This type casting is done by casting operators ‘( )’ and data type. 29
  30. 30. CONTD… #include <stdio.h> void main ( ) { int base, height, area; base = 5; height =3; area = (base * height)/2; printf ( “Area = %d n”, area); } Output : Area = 7 ……………………. Incorrect 30
  31. 31. CONTD… #include <stdio.h> void main ( ) { int base, height, area; base = 5; height = 3; area = ((float) (base * height)/2); printf ( “Area = %d n”, area); } Output : Area = 7.5 …………………….Correct 31
  32. 32. USER DEFINED DATA TYPE [A] Type Definition Allows user to define an identifier that would represent an existing data type Syntax: typedef type identifier Eg: typedef int units; units batch1, batch2; 32
  33. 33. CONTD… [B] Enumerated data type  Syntax: enum identifier { value1, value2... valuen}  Eg: enum day{ Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday} 33
  34. 34. VARIABLES  Variable names correspond to locations in the computer's memory  Data name that may be used to store a data value  It may take different values at different times during execution  Eg: char x; char y = ‘e’; 34
  35. 35. CONTD…  Rules Must begin with a letter(), some system permits underscore as first character. Length should be not more than 8 characters Uppercase and lowercase are significant, (i.e.) total and TOTAL are different Variable should not be a keyword White space is not allowed 35
  36. 36. C IS CASE SENSITIVE C is case sensitive: it distinguishes between UPPER case (CAPITAL) and lower case (small) letters. Keywords in C — for example, the keyword int — MUST be in lower case. For example: #include <stdio.h> int main () { /* main */ int height_in_cm; height_in_cm = 160; printf("My height is %d cm.n",height_in_cm); } /* main */ 36
  37. 37. C TOKENS  Keywords  Identifiers  Constants  Strings  Special Symbol  Operators 37
  38. 38. CONTD… Keywords auto double int struct break else long switch case enum register typedef char extern return union const float short unsigned continue for signed void default goto sizeof volatile do if static while  Keywords C uses 32 keyword have fixed meaning and cannot be changed 38
  39. 39. CONTD…  Constants Quantity that does not change is called a constant. Types Numeric constants Integer constants – 123, -33 Real constants – 0.992, 3.5e2 Character constants Single character constants – ‘5’, ‘a’ String Constants – ‘Hello’, ‘1999’ 39
  40. 40. CONTD… Backslash Characters Constants  n – Newline  b – Backspace  f – Form feed  t – Tab or horizontal tab  a – Audible alert  r – Carriage return  v – Vertical Tab  ’ – Single Quote  ” – Double Quote  ? – Question Mark  - Backslash  0 - Null 40
  41. 41. CONTD…  Identifiers Names of arrays, function and variable  Operators Arithmetic Relational Logical Bitwise 41
  42. 42. ARITHMETIC OPERATORS C operation Arithmetic operator Algebraic expression C expression Addition + f + 7 f + 7 Subtraction - p – c p - c Multiplication * bm b * m Division / x / y x / y Modulus % r mod s r % s CONTD…. 42
  43. 43. CONTD….  Equality and Relational Operators Standard algebraic equality operator or relational operator C equality or relational operator Example of C condition Meaning of C condition Equality Operators = == x == y x is equal to y not = != x != y x is not equal to y Relational Operators > > x > y x is greater than y < < x < y x is less than y >= >= x >= y x is greater than or equal to y <= <= x <= y x is less than or equal to y 43
  44. 44. CONTD….  Logical Operators: && logical And || logical Or ! logical Not  Bitwise Operators  & bitwise And  | bitwise Or  ^ bitwise Xor  ~ bitwise Not  << shift left  >> shift right 44
  45. 45. SAMPLE C PROGRAM 2 /* Program for multiplication of two variables */ #include< stdio.h> #include < conio.h> void main() { int a,b,c; clrscr(); printf(“Enter two numbers”); scanf(“%d%d”,&var1,&var2); c=a*b; printf (“n Multiplication of two numbers is %d ”,c); getch(); } 45
  46. 46. CONTD…  OUTPUT: Enter two numbers: 12 3 Multiplication of two numbers is 36 46
  47. 47. CONTROL STATEMENTS  These statements are used to control the flow of program by using these statements. We can have four types of control statements:-  decision making  case control statement or switch statement  looping / iteration statement  jump / branching statement 47
  48. 48. DECISION MAKING  These statements are used when we want to take any decision according to the condition or user requirement. These conditions are used by using ‘if’ statement. We can have four types of conditional statements  if  if-else  if – else if  nested if 48
  49. 49.  if if statement is simple decision making statement, which is used to take any decision when the condition is true. if (statement) { Statement; }  if (expression / condition) Statement; CONTD…. 49
  50. 50. CONTD….  If-else This statement is used to make decision in C language. If the given condition is true then the cursor will move to the true portion else it will move to the false portion. if (condition) { Statement; } else { Statement; } 50
  51. 51.  If else-if if (condition) { Statement; } else if (condition) { Statement; } else if (condition) { Statement; } else { Statement; 51
  52. 52. SWITCH CASE / SELECT CASE  These statements are used with the replacement of if-else and these statements are used when we have multiple options or choices.  These choices can be limited and when we use switch case we can use only integer or character variable as expression. 52
  53. 53.  Syntax: switch( expression) { case value-1: block-1; break; case value-2: block-2; break; ---- default: default-block; break; } statement -X; 53
  54. 54. LOOPING  These statements are used to control the flow of the program and repeat any process multiple times according to user’s requirement.  We can have three types of looping control statements.  while  do-while  for 54
  55. 55. CONTD… While  It is an entry control loop statement, because it checks the condition first and then if the condition is true the statements given in while loop will be executed.  SYNTAX:- Initialization; while (condition) { Statements; Incremental / decrement; } 55
  56. 56. CONTD… Do-while  Do-while loop is also called exit control loop.  It is different from while loop because in this loop the portion of the loop is executed minimum once and then at the end of the loop the condition is being checked and if the value of any given condition is true or false the structure of the loop is executed and the condition is checked after the completion of true body part of the loop. 56
  57. 57. CONTD…  SYNTAX:- Initialization do { Statement; Increment / decrement; } while (condition) 57
  58. 58. CONTD…. For loop  It is another looping statement or construct used to repeat any process according to user requirement but it is different from while and do- while loop because in this loop all the three steps of constructions of a loop are contained in single statement.  It is also an entry control loop.  We can have three syntaxes to create for loop:- 58
  59. 59. CONTD…. for (initialization; Test condition; Increment / decrement) { Statement; } ……………………………………. for (; test condition; increment / decrement) { Statement; } ……………………………………… 59
  60. 60. CONTD…. for (; test condition;) { Statement; Increment / decrement } 60
  61. 61. JUMPS STATEMENTS  These are also called as branching statements.  These statements transfer control to another part of the program. When we want to break any loop condition or to continue any loop with skipping any values then we use these statements. There are three types of jumps statements.  Continue  Break  Goto 61
  62. 62. CONTD…  Continue This statement is used within the body of the loop. The continue statement moves control in the beginning of the loop means to say that is used to skip any particular output.  WAP to print series from 1 to 10 and skip only 5 and 7. #include void main ( ) { int a; 62
  63. 63. CONTD… clrscr ( ); for (a=1; a<=10; a++) { if (a= =5 | | a= = 7) continue; printf (“%d n”,a); } getch ( ); } 63
  64. 64. CONTD… Break  This statement is used to terminate any sequence or sequence of statement in switch statement. This statement enforce indicate termination. In a loop when a break statement is in computer the loop is terminated and a cursor moves to the next statement or block;  Example:  WAP to print series from 1 to 10 and break on 5 #include void main ( ) { 64
  65. 65. CONTD… int a; clrscr ( ); for (a=1; a<=10; a++) { if (a= =5) break; printf (“%d n”,a); } getch ( ); } 65
  66. 66. CONTD… Goto statement  It is used to alter or modify the normal sequence of program execution by transferring the control to some other parts of the program. the control may be move or transferred to any part of the program when we use goto statement we have to use a label.  Syntax:  Forward Loop: goto label; …. …. label: statement; 66
  67. 67. CONTD…  Backward Loop: label: statement …. …. goto label; 67
  68. 68. COMMON PROGRAMMING ERRORS  Missing Semicolons Eg: a = x+y …… is wrong c= b/d; …… is right  Misuse of Semicolon Eg: for(i = 1; i <= 10; i++); sum = sum + i;  is wrong for(i = 1; i <= 10; i++) sum = sum + i; is right 68
  69. 69. CONTD…  Use of = instead of = =  Missing Braces  Missing Quotes  Improper Comment Characters  Undeclared Variables And many more…… 69
  70. 70. ASSIGNMENT  Write a C program to swap two entered number.  Write a C program to perform all the arithmetic operations.  Write a C program to find the area of a circle, triangle and rectangle.  Write a C program to calculate the area of circle, triangle and rectangle.  Write a C program to get a number from user and print a square and cube of that number. 70
  71. 71. CONTD…  Write a C program to display the greatest of three number using if else statement.  Write a C program to find the number is positive or negative.  Write a C program to find the number is odd or even.  Write a program to display the spelling of number using switch case. 71
  72. 72.  Write a C program to display the entered letter is vowel or a character.  Write a C program to display odd number from 1 to n using while loop and do while loop.  Write a C program to display even number from 1 to n using for loop. CONTD… 72
  73. 73. QUERIES? 73
  74. 74. THANK YOU!!! 74
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