【C语言】【面试题】【笔试题】模拟实现strncpy

#include <stdio.h>
#include <stdlib.h>
#include <assert.h>

char *my_strncpy(char *dest,const  char *src, int len)
{
char *ret = dest;
while (len--)
{
*dest++ = *src++;
}
*dest = '\0';
return ret;
}

int main()
{
char arr1[20] = "hello ";
char arr2[20] = "world!";
char *ret = my_strncpy(arr1, arr2, 1);
printf("%s", ret);
system("pause");
return 0;
}