C/C++中字符串存储位置

代码：

 #include <iostream>
 #include <cstdio>

 using namespace std;

 void fun(char **p){
     //char* s = "world";
     char s[] = "world";
     printf("point s = %p\n",s);
     *p = s;
     printf("point p = %p\n",*p);
 }

 int main(){

     char *p = "hello";
     printf("point p = %p\n",p);
     cout<<"func start"<<endl;
     fun(&p);
     cout<<"func end"<<endl;
     printf("point p = %p\n",p);
     cout<<p<<endl;

     return ;
 }

输出：

point p = 0x400acc
func start
point s = 0x7ffe10660100
point p = 0x7ffe10660100
func end
point p = 0x7ffe10660100
`

若将代码第8行注释并替换成第7行注释内容，输出为

point p = 0x400ac2
func start
point s = 0x400aa0
point p = 0x400aa0
func end
point p = 0x400aa0
world

分析：

常量字符串存储在文字常量区，而字符数组存储在栈上。