Swaptwonumber.c

#include<stdio.h>

int main() {

  double first, second, temp;

  printf("Enter first number: ");

  scanf("%lf", &first);

  printf("Enter second number: ");

  scanf("%lf", &second);

  // value of first is assigned to temp

  temp = first;

  // value of second is assigned to first

  first = second;

  // value of temp (initial value of first) is assigned to second

  second = temp;

  // %.2lf displays number up to 2 decimal points

  printf("\nAfter swapping, first number = %.2lf\n", first);

  printf("After swapping, second number = %.2lf", second);

  return 0;

}