一、递增递减

#define _CRT_SECURE_NO_WARNINGS
#include<iostream>
#include<string>
using namespace std;
int main()
{//1、前置递增int a = 10;++a;	//让变量+1cout << "a=" << a << endl;//2、后置递增int b = 10;b++;cout << "b=" << b << endl;//3、前置和后置的区别//前置递增，先让变量+1，然后进行表达式运算int a2 = 10;int b2 = ++a2 * 10;cout << "a2=" << a2 << endl;	//11cout << "b2=" << b2 << endl;	//110//后置递增，先进行表达式运算，后让变量+1int a3 = 10;int b3 = a3++ * 10;cout << "a3=" << a3 << endl;	//然后10++变为11cout << "b3=" << b3 << endl;	//10先运算100//4、后置递减同理system("pause");return 0;
}

运行结果：

a=11b=11a2=11b2=110a3=11b3=100