Microsoft Programmer's Library 1.3/Microsoft-Programers-Library-v1.3.iso/sampcode/qc/qc25/pfunc.c

C/C++ Source or Header | 1989-11-15 | 422 b | 22 lines

/* PFUNC.C: Passing pointers to a function. */
#include <stdio.h>

void swap( int *ptr1, int *ptr2 );

main()
{
   int first = 1, second = 3;
   int *ptr = &second;
   printf( "first: %d  second: %d\n", first, *ptr );
   swap( &first, ptr );
   printf( "first: %d  second: %d\n", first, *ptr );
}

void swap( int *ptr1, int *ptr2 )
{
   int temp;
   temp = *ptr1;
   *ptr1 = *ptr2;
   *ptr2 = temp;
}