Programming with the Dev C IDE 1 Introduction to the IDE Dev-C is a full-featured Integrated Development Environment (IDE) for the C/C programming language. As similar IDEs, it offers to the programmer a simple and unified tool to edit, compile, link, and debug programs. It also provides support for the management of the. What do I mean? C is a programming language-it will allow you to control your computer, making it do what you want it to do. This programming tutorial series is all about helping you take advantage of C. Getting Set Up - C Compilers The very first thing you need to do, before starting out in C, is to make sure that you have a compiler.
You may encounter situations, when a block of code needs to be executed several number of times. In general, statements are executed sequentially: The first statement in a function is executed first, followed by the second, and so on.
Programming languages provide various control structures that allow for more complicated execution paths.
A loop statement allows us to execute a statement or group of statements multiple times. Given below is the general form of a loop statement in most of the programming languages −
C programming language provides the following types of loops to handle looping requirements.
|Sr.No.||Loop Type & Description|
Repeats a statement or group of statements while a given condition is true. It tests the condition before executing the loop body.
Executes a sequence of statements multiple times and abbreviates the code that manages the loop variable.
It is more like a while statement, except that it tests the condition at the end of the loop body.
You can use one or more loops inside any other while, for, or do.while loop.
Loop control statements change execution from its normal sequence. When execution leaves a scope, all automatic objects that were created in that scope are destroyed.
C supports the following control statements.
|Sr.No.||Control Statement & Description|
Terminates the loop or switch/using-traktor-pro-2.html. statement and transfers execution to the statement immediately following the loop or switch.
Causes the loop to skip the remainder of its body and immediately retest its condition prior to reiterating.
Transfers control to the labeled statement.
A loop becomes an infinite loop if a condition never becomes false. The for loop is traditionally used for this purpose. Since none of the three expressions that form the 'for' loop are required, you can make an endless loop by leaving the conditional expression empty.
When the conditional expression is absent, it is assumed to be true. You may have an initialization and increment expression, but C programmers more commonly use the for(;;) construct to signify an infinite loop.
NOTE − You can terminate an infinite loop by pressing Ctrl + C keys.
C programs with output showing usage of operators, loops, functions, arrays, performing operations on strings, files, pointers. Download executable files and execute them without compiling the source file. Code::Blocks IDE is used to write programs, most of these will work with GCC and Dev C++ compilers. The first program, prints 'Hello World.'
Example 1 - C hello world program
/** My first C program */
Output of program:
Example 2 - C program to get input from a user using scanf#include <stdio.h>
printf('Input an integern');
scanf('%d',&x);// %d is used for an integer
printf('The integer is: %dn', x);
Input an integer
The integer is: 7897
Example 3 - using if else control instructions#include <stdio.h>
printf('Enter a numbern');
printf('Greater than zero.n');
printf('Less than or equal to zero.n');
Enter a number
Less than or equal to zero.
Example 4 - while loop example
1 2 3 4 5 6 7 8 9 10
Example 5 - C program check if an integer is prime or not
Example 6 - command line arguments#include <stdio.h>
int main(int argc,char*argv)
printf('Number of command line arguments passed: %dn', argc);
for(c =0; c < argc; c++)
printf('%d argument is %sn', c +1, argv[c]);
This program prints the number of arguments and their contents.
Example 7 - Array program#include <stdio.h>
int array, n, c;
printf('Enter number of elements in arrayn');
printf('Enter %d elementsn', n);
for(c =0; c < n; c++)
printf('The array elements are:n');
for(c =0; c < n; c++)
Example 8 - function program#include <stdio.h>
void my_function();// Declaring a function
my_function();// Calling the function
printf('Back in function main.n');
// Defining the function
printf('Welcome to my function. Feel at home.n');
Example 9 - Using comments in a program
Example 10 - using structures in C programming#include <stdio.h>
};// Note the semicolon
struct game g;
printf('Name of game: %sn', g.game_name);
printf('Number of players: %dn', g.number_of_players);
Example 11 - C program for Fibonacci series#include <stdio.h>
int n, first =0, second =1, next, c;
printf('Enter the number of termsn');
printf('First %d terms of Fibonacci series are:n', n);
for(c =0; c < n; c++)
next = c;
next = first + second;
first = second;
second = next;
Example 12 - C graphics programming
int gd = DETECT, gm;
outtextxy(10,20,'Graphics programming is fun!');
If you are using GCC on Linux operating system, then you may need to modify the programs. For example, consider the following program that prints the first ten natural numbers.#include <stdio.h>
for(c =1; c <=10; c++)
The program includes a header file
<conio.h> and uses function getch, but this file is Borland specific, so it works in Turbo C compiler but not in GCC. The program for GCC must be like:
/* for loop */
for(c =1; c <=10; c++)
If you are using GCC, save the program in a file say 'numbers.c' to compile the program, open the terminal and enter the command 'gcc numbers.c', this compile the program and to execute it enter the command './a.out' do not use quotes while executing commands. You can specify the output file name as 'gcc numbers.c -o numbers.out', to run execute './numbers.out' in the terminal.
A program consists of functions that contain instructions given to a machine to perform a task. The process of writing it includes designing an algorithm, drawing a flowchart, and then writing code. After writing it, you need to test it and debug it if it does not produce the required output.
To write a program, you need a text editor (use your favorite one) and a compiler. A compiler converts source code into machine code, which consists of zero's and one's only, ready to be executed on a machine.
An IDE (Integrated Development Environment) provides a text editor, compiler, debugger, etc. for developing programs and managing projects. Code::Blocks IDE provides an ideal environment for development. It can import Microsoft Visual C++ projects, is extendable as it uses plug-ins, open-source, and cross-platform.
A program must have at least one function which must be main. A function consists of declarations and statements. A statement is an expression followed by a semicolon. For example, a + b, printf('C program examples') are expressions and a + b; and printf('C is an easy to learn computer programming language'); are statements.
To use a variable, we must indicate its type, whether it is an integer, float, character, or others. C language has many built-in data types, and we can create our own using structures and unions. Every data type has its size that may depend on the machine; for example, an integer may be of 2 or 4 Bytes. Data is stored in a binary form, i.e., a group of bits where each bit can be '0' or '1'.
Keywords such as 'switch,' 'case,' 'default,' 'register,' are reserved words with predefined meaning and can't be used as the name of a variable or a function. Memory can be allocated at compile-time or run-time using malloc and calloc functions. C language has many features such as recursion, preprocessor, conditional compilation, portability, pointers, multi-threading by using external libraries, dynamic memory allocation. Thanks to these, it is used for making portable software programs and applications. Using networking API's users can communicate and interact with each other and share files.
C standard library contains functions for mathematical operations, characters, input/output, files, and many more. The process of making a program which is known as coding requires knowledge of programming language and logic to achieve the desired output. So you should learn C programming basics and start making programs.
Learning data structures (stacks, queues, linked lists) using C provides you a greater understanding as you learn everything in detail. A general belief is to go for high-level languages. However, it's a good idea to learn C before learning C++ or Java. C++ is object-oriented and contains all features of C, so learning C help you learn C++ quickly, then you can study Java.
If you are a beginner, buy any one of the first two books, and if you have previous programming experience or you know the basics of C language, buy the third one.