1.Program to Swap Two Numbers

 #include<stdio.h>

void main()

{

int A,B, temp;

printf("Enter value of A ");

scanf("%d", &A);

printf("Enter value of B ");

scanf("%d", &B);

printf("\nBefore swapping A= %d B= %d\n\n",A,B);

temp = A;

A = B;

B = temp;

printf("After swapping A= %d B= %d\n", A,B);

}