download：轻松实现 Rust 零碎入门，实战编译器开发

上面的都不重要
// 四则运算

include “stdafx.h”

include

include<stdio.h>

using namespace std;
void add()
{

printf("输出要计算的加数（例如 a b）\n");
int adda=0, addb=0,addc=0;
cin >> adda;
cin >> addb;
addc = adda+addb;
cout <<adda<<"加"<<addb<< "等于" << addc << endl;
 

}
void substraction()
{

printf("输出要计算的减数（例如 a b）\n");
int suba = 0, subb = 0, subc = 0;
cin >> suba;
cin >> subb;
subc = suba-subb;
cout <<suba<<"减"<<subb<< "等于" << subc << endl;

}
void multiplication()
{

printf("输出要计算的乘数（例如 a b）\n");
int mula = 0, mulb = 0, mulc = 0;
cin >> mula;
cin >> mulb;
mulc = mula*mulb;
cout <<mula<<"乘"<<mulb<< "等于" << mulc << endl;

}
void division()
{

printf("输出要计算的除数（例如 a b）\n");
int dsa = 0, dsb = 0, dsc = 0,dsd=0;
cin >> dsa;
cin >> dsb;
dsc = dsa/dsb;
dsd = dsa%dsb;
cout <<dsa<<"除"<<dsb<< "等于" << dsc <<"余"<<dsd<<endl;

}
void operation()// 运算函数
{

printf("输出数据抉择做那种运算 \n");
printf("输出 0 抉择退出，1 做加法，2 做减法，3 做乘法，4 做除法（保留余数）\n");
 
int operatione = 0;
cin >> operatione;
cout << endl;
try
{if (operatione == 1)
    {
        // 加法
        add();}
    else if (operatione == 2)
    {
        // 减法
        substraction();}
    else if (operatione == 3)
    {
        // 乘法
        multiplication();}
    else if (operatione == 4)
    {
        // 出发
        division();}
    else if (operatione == 0)
    {exit(0);
    }
    else
    {throw 1;}
}
catch (int i)
{cout << "输出谬误" << endl;}
operation();

}
int main()
{

printf("欢迎使用本计算器");
operation();
return 0;

}