4章5节递增递减前后缀的区别

#include <iostream>

int main()
{
using namespace std;

int myage =23, yourage=30;
cout << "i am "<< myage << "years old "<< endl;
cout << "you are " << yourage << "yourage" << endl;

myage++; //后缀是先赋值再递减1
++yourage;//前缀是先递增再赋值1给前面的myage

cout << "1 year passed" << endl;
cout << "i am "<< myage << "years old "<< endl;
cout << "you are " << yourage << "yourage" << endl;

myage++;
++yourage;

cout << "2 years passed" << endl;
cout << "i am "<< myage << "years old "<< endl;
cout << "you are " << yourage << "yourage" << endl;

myage++;
++yourage;

cout << "3 years passed" << endl;
cout << "i am "<< myage << "years old "<< endl;
cout << "you are " << yourage << "yourage" << endl;

return 0;
}