#include "stdafx.h"
#include "memory.h"
void memset_1(unsigned char *&v1)
{
unsigned char *ptmp=(unsigned char *)v1;
memset(ptmp,100,20);
}
int _tmain(int argc, _TCHAR* argv[])
{
unsigned char *pchar=new unsigned char[20];
memset(pchar,0,20);
printf("before memset%d\n",pchar[1]);
memset_1(pchar);
printf("after memset%d\n",pchar[1]);
delete []pchar;
return 0;
}
这段代码运行ok,而下面这段代码运行编译错误!
error C2664: “memset_1”: 不能将参数 1 从“unsigned char [20]”转换为“unsigned char *&”
// c_def.cpp : 定义控制台应用程序的入口点。
//
#include "stdafx.h"
#include "memory.h"
void memset_1(unsigned char *&v1)
{
unsigned char *ptmp=(unsigned char *)v1;
memset(ptmp,100,20);
}
int _tmain(int argc, _TCHAR* argv[])
{
unsigned char pchar[20];
memset(pchar,0,20);
printf("before memset%d\n",pchar[1]);
memset_1(pchar);
printf("after memset%d\n",pchar[1]);
delete []pchar;
return 0;
}
你看出区别了吗?