c program

1. DIPTA SAHA
Diptasaha.lpu.cse@gmail.com

2. History Of
C is a middle level programming language.which is
developed by Dennis Ritchie while working at AT&T Bell
Labs in USA in between 1969 and 1973.

3. {
First C Program;
}
 1#include<stdio.h>
 2 int main()
 3 {
 4 printf("Hello C");
 5 return 0;
 6 }

4. {
Comments in C Program;
}
Single Line comment
/*…comments…..*/
Multi Line Comments
/*
Comments
*/

5. {
Variable in C;
}

6. {
Local Variable in C;
}
A local variable is a variable that is declared inside a function.

7. {
Global Variable in C;
}
A Global variable is a variable that is declared Outsite a function.

8. {
Data type in C;
}

9. {
Size of Data type in C;
}
int 2 -32768 to +32767
long 4 -2,147,483,648 to
2,147,483,647
Float 4 1.2E-38 to 3.4E+38
Double 8 2.3E-308 to 1.7E+308
Char 1 -128 to +127
Data Type Name Size(Byte) Range

10. {
Variable Declaration in C;
}
 Syntax
Datatype_name variable_name;
or
Datatype_name variable_name = values;
Example
Int a;
Or
Int a = 100;

11. {
Constant Variable Declaration in C;
}
 Syntax
Const Datatype_name variable_name = values;
Example
Const float pi = 3.1416;

12. {
Format Specifier in C;
}

13. {
Escape Sequence in C;
}
•n (newline)
•t (tab)
•v (vertical tab)
•f (new page)
•b (backspace)
•r (carriage return)
•n (newline)

14. {
get From User in C;
}
 Syntax
scanf("%d",&i);
Example
Int a;
Scanf(“%d”,&a);

15. {
Simple Program for get From User in C;
}

16. {
Operator in C;
}
C language is rich in built-in operators and provides the
following types of operators −
1. Arithmetic Operators
2. Relational Operators
3. Logical Operators
4. Bitwise Operators
5. Assignment Operator

17. {
Arithmetic Operator in C;
}

18. {
Relational Operator in C;
}

19. {
Logical Operator in C;
}

20. {
Bitwise Operator in C;
}

21. {
Assingment Operator in C;
}

22. {
Condition Operator in C;
}
Syntax:
(condition) ? True_res : false_res;
#include <stdio.h>
int main()
{
int x=1, y ;
y = ( x ==1 ? 2 : 0 ) ;
printf("x value is %dn", x);
printf("y value is %d", y);
}

23. {
Simple Program Using Operator in C;
}
 1 #include<stdio.h>
 2int main()
 3{
 4 int a=10,b=5;
 5 int add = a+b;
 6 int sub = a-b;
 7 int mul = a*b;
 8 int div = a/b;
 9 printf(“Add = %d”,add);
 10 printf(“Sub = %d”,sub);
 11 printf(“mul = %d”,mul);
 12. printf(“div = %d”,div);
 13return 0;
 14}

24. {
Decision making in C;
}

25. {
Conditional Execution in C;
}
In the c programming have some decision making Statement.
1. if statement
2. if...else statement
3. nested if statements
4.switch statement
5. nested switch statements

26. {
If Condition in C;
}
 Syntax
If(condition)
{
Statement..1;
Statement..2;
Statement..n;
}

27. {
Simple Program using If Condition in C;
}

28. {
if else Condition in C;
}
 Syntax
If(condition)
{
Statement;
}
Else
{
Statement;
}

29. {
Simple Program using If else Condition in C;
}

30. {
Nested if Condition in C;
}
 Syntax
If(condition)
{
Statement;
if(condition)
{
Statement;
}
}

31. {
Switch Statement in C;
}
 Syntax
Switch(expression)
{
Case constant_expression_1:
Statement 1;
Break;
Case constant_expression_2:
Statement 2;
Break;
Case constant_expression_3:
Statement 3;
Break;
Default:
Statement 4;
}

32. {
nested Switch Statement in C;
}  Syntax
Switch(expression-1)
{
Case constant_expression_1:
Switch(expression-1)
{
case constant_expression :
statement;
break;
}
Break;
Case constant_expression_2:
Statement 2;
Break;
Default:
Statement 3;
}

33. {
Loops in C;
}

34. {
Types of Loops in C;
}
1. while loop
2. for loop
3. do...while loop
4. nested loops

35. {
while Loop in C;
}
Syntax
Initialization;
While(condition)
{
Statement..1;
Statement..2;
Statement..n;
increment/decrement;
}

36. {
A simple Program using While Loop in C;
}

37. {
for Loop in C;
}
Syntax
for(Initialization;condition; increment/decrement)
{
Statement..1;
Statement..2;
Statement..n;
}

38. {
A simple Program using For Loop in C;
}

39. {
do while Loop in C;
}
Syntax
Initialization;
do
{
Statement..1;
Statement..2;
Statement..n;
increment/decrement;
}
While(condition)

40. {
A simple Program using Do While Loop in C;
}

41. {
nested for Loop in C;
}
Syntax
for(Initialization;condition; increment/decrement)
{
Statement..1;
for(Initialization;condition; increment/decrement)
{
Statement..1;
Statement..2;
Statement..n;
}
}

42. {
Break Statement in C;
}
The break statement terminates the loop body immediately
and passes control to the next statement after the loop. Break
statement are mainly used with loop and switch statement.

43. {
A Simple Program Using Break Statement in C;
}

44. {
Continue Statement in C;
}
The continue statement in C programming works somewhat
like the breakstatement.

45. {
A Simple Program Using continue Statement in C;
}

46. {
Function in C;
} Syntax
Return_type function_name(argument)
{
statement;
return need_variable;
}
Example:
Int sum(int x,int y)
{
return x+y;
}

47. {
Function call in C;
}
Syntax:
Function_name(parameter or argument);
Example:
1 #include<stdio.h>
2 int main()
3 {
4 Int z=sum(10,20);
5 printf(z);
6 return 0;
7 }

48. {
Array in C;
}

49. {
Types Of Array in C;
}

50. {
Single Dimensional Array in C;
}
Syntax
data_type array_name [size];

51. {
Multi Dimensional Array in C;
}
Syntax
data_type array_name [row_size][column_size];

52. {
A simple program using 1D Array in C;
}

53. {
* Pointer in C;
}
A pointer is a variable whose value is the address of
another variable. Like any variable or constant, you must
declare a pointer before using it to store any variable
address.

54. {
Declaration of Pointer in C;
}
Syntax
data_type *var_name;
Example
int var = 20;
int *ip;
ip = &var;

55. {
A Simple Program Using Pointer in C;
}

56. {
File in C;
}
file is a place on your physical disk where information is stored.
Open a File
FILE *name;
name = fopen(“text.txt","a");
fclose(name);

57. {
File in C;
}
Write in a File
FILE *name;
name = fopen(“text.txt",“w");
If(name == NULL)
{
printf(“File Dose Not exist”);
}
else
{
for(i = 0; i < 10;i++){
fprintf (fp, "This is line %dn",i + 1);
}
fclose(name);
}

58. {
File in C;
}
Read in a File
FILE *name;
name = fopen(“text.txt",“w");
Char buff[200];
If(name == NULL)
{
printf(“File Dose Not exist”);
}
else
{
while(fscanf(fp, "%s", buff)!=EOF){
printf("%s ", buff );
}
fclose(name);
}

59. exit(Presentation);