运行下面程序，观察其输出，体会i++和++i的差别。_#include using namespace std;int main()

#include <iostream>
using namespace std;
int main() {
    int myAge = 39;
    int yourAge = 39;
    cout << "I am: " << myAge << "years old." << endl;
    cout << "you are :" << yourAge << "years old." << endl;
    myAge++;
    ++yourAge;
    cout << "one year passes..." << endl;
    cout << "I am: " << myAge << "years old." << endl;
    cout << "you are :" << yourAge << "years old." << endl;
    cout << "another year passes..." << endl;
    cout << "I am: " << myAge++ << "years old." << endl;    //这里自加++后置，所以myAge先随cout输出再自加1；
    cout << "you are :" << ++yourAge << "years old." << endl;
    cout << "Let's print it again." << endl;
    cout << "I am: " << myAge << "years old." << endl;
    cout << "you are :" << yourAge << "years old." << endl;
    return 0;
}