闲来无事，看看这个算术游戏吧。正好考考你的算术能力。有点恶搞。#include<stdio.h>#include<windows.h>usingnamespacestd;intchoice;voidexit();voidlevel_1();voidlevel_2();voidlevel_3();voidlevel_4();voidlevel_5();intmain(){ system("cls")