#include <cstdio>
#include <iostream>
using namespace std;

int main()
{
    int a = 6;
    int c = a++;
    cout << a << ' ' << c << endl;//c为原来a的值，先执行c=a，再进行a+1
    int b = 8;
    int d = ++b;
    cout << b << ' ' << d << endl;//d等于b+1过后的值，且先执行的是b+1
    //b +=a;b=b + a;
    //b -=a;b=b - a;
    //b *=a;b=b * a;
    //b /=a;b=b / a;
    return 0;
}