This document provides an overview of programming with C for an introduction to programming languages course. It discusses the imperative programming paradigm used in C and highlights some key differences from Java, such as the use of pointers, structures, and the absence of classes. The outline covers getting started with C, primitive data types, pointers, structures, functions, and control statements. It also provides examples of input/output using printf and scanf and conditional statements.
It is an attempt to make the students of IT understand the basics of programming in C in a simple and easy way. Send your feedback for rectification/further development.
It is an attempt to make the students of IT understand the basics of programming in C in a simple and easy way. Send your feedback for rectification/further development.
Operators and expressions in c languagetanmaymodi4
what is operator in c language
uses of operator in c language
syatax of operator in c language
program of operator in c language
what is expressions in c language
use of expressions in c language
syantax of expressions in c language
C Building Blocks
• Variable and Types of Variables
• Input Functions: scanf() and getche()
• Arithmetic Operators
– Arithmetic Assignment Operators
– Increment/Decrement Operators
• Relational Operators
• Comments in C
Operators and expressions in c languagetanmaymodi4
what is operator in c language
uses of operator in c language
syatax of operator in c language
program of operator in c language
what is expressions in c language
use of expressions in c language
syantax of expressions in c language
C Building Blocks
• Variable and Types of Variables
• Input Functions: scanf() and getche()
• Arithmetic Operators
– Arithmetic Assignment Operators
– Increment/Decrement Operators
• Relational Operators
• Comments in C
Programming Fundamentals Functions in C and typesimtiazalijoono
Programming Fundamentals
Functions in C
Lecture Outline
• Functions
• Function declaration
• Function call
• Function definition
– Passing arguments to function
1) Passing constants
2) Passing variables
– Pass by value
– Returning values from functions
• Preprocessor directives
• Local and external variables
Esoft Metro Campus - Certificate in c / c++ programmingRasan Samarasinghe
Esoft Metro Campus - Certificate in java basics
(Template - Virtusa Corporate)
Contents:
Structure of a program
Variables & Data types
Constants
Operators
Basic Input/output
Control Structures
Functions
Arrays
Character Sequences
Pointers and Dynamic Memory
Unions
Other Data Types
Input/output with files
Searching
Sorting
Introduction to data structures
This is a presentation on C language. Brief description on C language
Topics Covered
What is C
Header files in C
What is main function in c
Basic Structure of C
Keywords & Identifiers
Data Types & Variable Declaration in C Includes | Format Specifier | Memory Size
Input in C (printf() scanf() function)
Operators in C: Asthmatics,Increment Decrement, Relational, Logical operators
Sample Exercise
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GitHub: https://github.com/shamsulhusainansari
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201801 CSE240 Lecture 06
1. CSE240 – Introduction to
Programming Languages
Lecture 06:
Programming with C
Javier Gonzalez-Sanchez
javiergs@asu.edu
javiergs.engineering.asu.edu
Office Hours: By appointment
2. Javier Gonzalez-Sanchez | CSE 240 | Fall 2017 | 2
Imperative Paradigm
Fully specified and fully controlled
manipulation of named data in a stepwise fashion.
which means that:
Programs are algorithmic in nature:
do this, then that, then repeat this ten times
Focuses on how rather than what.
variables
functions (methods in Java)
Loop statements
Conditional statements
3. Javier Gonzalez-Sanchez | CSE 240 | Fall 2017 | 3
Paradigms
variables
functions (methods in Java)
Loop statements
Conditional statements
4. Javier Gonzalez-Sanchez | CSE 240 | Fall 2017 | 4
Paradigms
variables
functions (methods in Java)
Loop statements
Conditional statements
// Different from
// Java
Arrays
Structs
Pointers
5. Javier Gonzalez-Sanchez | CSE 240 | Fall 2017 | 5
Paradigms
variables
functions (methods in Java)
Loop statements
Conditional statements
/*There are NOT
classes
Classes and
Objects will
appear in C++
*/
// Different from
// Java
Array
Structures
Pointers
6. Javier Gonzalez-Sanchez | CSE 240 | Fall 2017 | 6
Outline
1. Getting started with Language C
2. Primitive data types, arrays (and strings)
3. Pointers
4. typedef, enum and struct type
5. Functions calls and parameter passing
8. Javier Gonzalez-Sanchez | CSE 240 | Fall 2017 | 8
We Need a Compiler
• Microsoft Visual Studio for C/C++
View instructions on Blackboard
• Online Compiler for C/C++
https://www.onlinegdb.com/online_c_compiler
• Dev-C++ 5
http://www.bloodshed.net/devcpp.html
9. Javier Gonzalez-Sanchez | CSE 240 | Fall 2017 | 9
Reference
• Textbook
Section 2.1 to 2.5 and 2.7
Optional 2.6 (files), 2.7 (recursion). – not included in the exam
• The Programming Language C by Kernighan and Ritchie
https://archive.org/details/TheCProgrammingLanguageFirstEdition
• Learning C programming
https://www.tutorialspoint.com/cprogramming/cprogramming_tutorial.pdf
10. Javier Gonzalez-Sanchez | CSE 240 | Fall 2017 | 10
Anatomy of a Program in C
• The parts (components) of a C program are called functions.
• There are built-in functions that exist in libraries and user defined
functions that are written by the programmers.
• You can declare variables inside and outside functions. They are
called local variables and global variables, respectively.
• And, a program in C must contain exactly one main( ) function.
11. Javier Gonzalez-Sanchez | CSE 240 | Fall 2017 | 11
Getting Started
1. Comments are identical in Java
2. #include is equivalent to import
3. Libraries are *.h files
4. There are not classes
5. Methods are called functions.
6. Global variables, local
variables, and parameters.
7. Most of the lexical, syntactical,
and semantical rules are as you
know from your Java courses
12. Javier Gonzalez-Sanchez | CSE 240 | Fall 2017 | 12
main()
8. Like Java, main( ) is the entry point
for program execution.
But, (1) C allows void or int as
type for main; (2) C allows empty
parameters or two parameters for
main. This are correct:
• void main () {
}
• void main (int argc, char *argv [ ]) { }
• int main() {return 0;}
• main() {return 0;} // if there is not a
type, C apply as default int
• int main (int argc, char *argv [ ]) { }
13. Javier Gonzalez-Sanchez | CSE 240 | Fall 2017 | 13
main()
8. Like Java, main( ) is the entry point
for program execution.
But, (1) C allows void or int as
type for main; (2) C allows empty
parameters or two parameters for
main. This are correct:
• void main () {
}
• void main (int argc, char *argv [ ]) { }
• int main() {return 0;}
• main() {return 0;} // if there is not a
type, C apply as default int
• int main (int argc, char *argv [ ]) { }
public static void main(String [] args) {
}
14. Javier Gonzalez-Sanchez | CSE 240 | Fall 2017 | 14
Output
printf (control sequence, expressions);
• The control sequence includes a
constant string to be printed, e.g.,
"Result: ", and control symbols to be
used to convert variables from their
numeric values that are stored in the
computer to printing format.
• The expressions is the list of
expressions whose values are to be
printed out. Each expression is
separated by a comma. This is
optional.
15. Javier Gonzalez-Sanchez | CSE 240 | Fall 2017 | 15
Output
printf (control sequence, expressions);
• The control sequence includes a
constant string to be printed, e.g.,
"Result: ", and control symbols to be
used to convert variables from their
numeric values that are stored in the
computer to printing format.
• The expressions is the list of
expressions whose values are to be
printed out. Each expression is
separated by a comma.
%d for integer
%f for floating point
%c for character
%s for string of characters
%p address
16. Javier Gonzalez-Sanchez | CSE 240 | Fall 2017 | 16
Output
printf (control sequence, expressions);
• The control sequence includes a
constant string to be printed, e.g.,
"Result: ", and control symbols to be
used to convert variables from their
numeric values that are stored in the
computer to printing format.
• The expressions is the list of
expressions whose values are to be
printed out. Each expression is
separated by a comma. This is
optional.
// Java
int x = 5;
float y = 10.3f;
System.out.println("hello " + x + " bye " + y);
// C
int x = 5;
float y = 10.3;
printf("hello %d bye %f", x, y);
17. Javier Gonzalez-Sanchez | CSE 240 | Fall 2017 | 17
#include <stdio.h>
void main () {
int i, n = 5;
printf("Hi, please enter an integer: ");
// input: scanf (control sequence, &variable1, ... &variablen);
// &variable: address of the variable.
scanf("%d", &i); // input function
if (i > n)
n = n + i;
else
n = n - i;
printf("i = %d, n = %dn", i, n); //output function
}
Input
18. Javier Gonzalez-Sanchez | CSE 240 | Fall 2017 | 18
Control Statements
These that you know, work in the same way
• for, while, do/while
• if/else, switch
But, there are not boolean values. Zero is false and any other number is true.
The following program is correct and print “Hello”
19. CSE240 – Introduction to Programming Languages
Javier Gonzalez-Sanchez
javiergs@asu.edu
Fall 2017
Disclaimer. These slides can only be used as study material for the class CSE240 at ASU. They cannot be distributed or used for another purpose.