Answer to Question #43023 in C++ for Syed Talha Shah

Question

Write a program to make the pointer to the function for swapping two integers.

Answer 1

/* Answer on Question#43023 - Subject - Programming, C++ */
#include <stdio.h>
#include <stdlib.h>
void (*p) ( int, int ); /* pointer to function */
void swap( int x, int y) /* swapping two integer function */
{
   int temp = y; /*temp var*/
   y = x;        /* swapping */
   x = temp;
   printf("Integers after awapping...\nx= %d\ny= %d\n",x,y);
}
int main()  /* main function*/
{
   int x,y;       
   printf("x= ");  /* user's input of integers */
   scanf("%d",&x);
    printf("y= ");
   scanf("%d",&y);
   p = &swap;   /*  pointer to swap */ 
   p(x,y);   /* call the function */
   system("pause");
   return 0;
}