"i++"和“++i”的区别

测试：

#include <iostream>
using namespace std;
int main(){
    int i =0;
    cout << "初始化 i == " << i << endl;

    cout << "i++ == " << i++ << endl;
    cout << "经过 i++ 运算，此时的i: " << i << endl;

    cout << endl;

    i = 0;    // i 重置为0
    cout << "初始化 i == " << i << endl;
    cout << "++i == " << ++i << endl;
    cout << "经过 ++i 运算，此时的i: " << i << endl;
}