只读数据区
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
int main1(void)
{
char * str = "hello";
*str = 'H';
printf("%s\n", str);
system("pause");
}
int main2(void)
{
char str[] = "hello";
*str = 'H';
printf("%s\n", str);
system("pause");
}