断言使用

#define _CRT_SECURE_NO_WARNINGS 1

#include<stdio.h>

#include<string.h>

#include<assert.h>

void my_strcpy(char*dest,const char*src)

{

assert(src != NULL);//断言

assert(dest != NULL);//断言

while(* dest++ = * src++)

{

  ;//拷贝

   

 

}

*dest = * src;

}

int main()

{

char arr1[20] = "XXXXXXXXXXX";

char arr2[] = "hello仲康电子";

my_strcpy(arr1,arr2);

printf("%s\n",arr1);

 return 0;

}