Pointer variable as a function parameter The function of the pointer type is to tell the address of one variable to another function
//在函数过程中通过指针实现交换两个变量的值
#include "stdafx.h"
#include <stdio.h>
int main(int argc, char* argv[])
{
void swap(int *p1,int *p2);
int a,b;
int *pointer_1,*pointer_2;
printf("please enter a and b");
scanf("%d,%d",&a,&b);
pointer_1=&a;
pointer_2=&b;
if(a<b) swap(pointer_1,pointer_2);
printf("max=%d,min=%d\n",a,b); Output result
return 0;
}
void swap(int *p1,int *p2)// The point of the pointer, pointer as a parameter When the function is called, the value of the parameter variable is transferred to the parameter variable, which is the method of value transfer.
{int temp;
temp=*p1;
*p1=*p2; Make *p1 and *p2 interchangeable
*p2=temp;
}
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Posted on 12/10/2015 1:46:59 PM
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