修改指针指向的值

#include <stdio.h>
#include <iostream>
#include <stdlib.h>
using namespace std;
int main() {
    //如果是整形，如何改变指针指向的值
    int a[2] = { 111,222 };
    int* p = a;
    int* p2;
    p2 = p;
    *p = 22;
    //如果是字符串型，如何改变指针指向的值
    const char* aa = "I love China!";
    const char* bb = "u love China!";
    int cc = (int)(bb - aa);
    const char* pp = (aa + cc);
    while (*pp)
    {
            putchar(*pp);    //单字符输出
            pp++;
     }
    return 0;
 }