C Program For Variable Exchange - 02.

This Post Contains A C Program For Exchanging The Values Of Two Variables Without Using A Third [Temporary] Variable With Correct Source Code & Output. This Program Is Written, Compiled & Executed At TurboC3.0 Compiler & Will Help You To Understand The Concept Of Variable Manipulation From C Language. It Is A Well-Structured Program With Proper Comments Which Provides Step-By-Step Description Of Various Features Of The Language In A Simple
& Easy-To-Understand Way.

# Note : You Can Simply Copy-Paste The Following Program Or Code Into Compiler For Direct Result.


C Program For Variable Exchange.

/* Declaration Of Header Files */
#include<stdio.h>
#include<conio.h>

/* Start Of Main Program */
void main()
{

    /* Declaration Of Variables */
    int a = 0, b = 0;

    clrscr();

    /* Accepting The Values Of Two Variabe From User */
    printf("\n Please Enter Number For Variable A : ");
    scanf("%d", &a);
    printf("\n Please Enter Number For Variable B : ");
    scanf("%d", &b);

    printf("\n Values Of Two Variables [i.e. A & B] Before Exchange : %d  %d", a, b);

    /* Main Code For Exchanging The Values Of Two Variables Using Temporary Variable */
    b =  a + b;
    a =  b - a;
    b =  b - a;

    /* Printing The Values Of Two Variables After Exchange */
    printf("\n\n Values Of Two Variables [i.e. A & B] After  Exchange : %d  %d", a, b);

    getch();
}

/* End Of Program */

Output :


Please Enter Number For Variable A  :  1
Please Enter Number For Variable B  :  2
Values Of Two Variables [i.e. A & B] Before Exchange  :  1  2
Values Of Two Variables [i.e. A & B] After Exchange  :  2  1