C warning“comparison between pointer and integer [enabled by default]”

一个小程序

#include <stdio.h>

void PrintHello(void)

{

char ptr[] = "Hello wordl";

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

return;

}

char *GetString(char *dest,const char *src)

{

char *temp = dest;

while(*src != 'NULL')

*dest++ = *src++;

return temp;

}

报警告 warning“comparison between pointer and integer [enabled by default]”

~

当src是char 类型到时候，应该用'\0' or 0;

while(*src != '\0')