Program 12: To swap two numbers using 3rd variable

Program 12:
 

#include<stdio.h>
main()
{
 int a,b,c;
 printf("Enter a\n");
 scanf("%d",&a);
 printf("Enter b\n");
 scanf("%d",&b);
 printf("The values of a is %d and b is %d before swaping\n",a,b);
 c=a;
 a=b;
 b=c;
 printf("The values of a is %d and b is %d after swaping\n",a,b);
}

Explanation:

1. Here we initialized a,b,c
   • a---> for storing 1st number
   • b--->for storing second number
   • c---->for storing temporary variable
2. Now here goes the logic(let us take a=1 and b=3)
   • c=a, Therefore, c=1
   • a=b, Therefore a=3
   • b=c, Therefore b=1
   • Now the values of a and b are 3 and 1
3. The values of a and are printed.

Output: