Swap the values of two Integers using C programming.

• Swap using 3rd variable :-

Program :

#include<stdio.h>

#include<conio.h>

void main()

{ int a,b,c;

clrscr();

printf("Enter the value of a\n");

scanf("%d",&a);

printf("Enter the value of b\n");

scanf("%d",&b);

printf("Before swapping a=%d, b=%d\n",a,b);

c=a;

a=b;

b=c;

printf("After swapping a=%d, b=%d",a,b);

getch();

}

Output :

• Swap without using 3rd variable :-

Program :

#include<stdio.h>

#include<conio.h>

void main()

{ int a,b;

clrscr();

printf("Enter the value of a\n");

scanf("%d",&a);

printf("Enter the value of b\n");

scanf("%d",&b);

printf("Before swapping a=%d, b=%d\n",a,b);

a=a+b;

b=a-b;

a=a-b;

printf("After swapping a=%d, b=%d",a,b);

getch();

}

Output :