实现一个加减乘除运算的小型系统，进行整数的加、减、乘、除运算？

1）在每一种运算下，由系统随机产生两个数（建议数值大小在1~100之间，但不限于此）参加运算，当用户根据系统提供的公式进行计算，并输入计算结果后，系统判断结果的对错。如果结果正确，则显示“Very Good”，否则，显示“Wrong!!!”。
2）每次选择一种运算后，系统随机产生5道题目，当用户运算完毕后，系统给出正确率。如用户5题答对了3题，则显示正确率为60%。运算完毕后，系统将返回主菜单，供用户再次选择。

#include <iostream>
using namespace std;
/**用位运算实现整数的加运算*/
int add(int a,int b)
{
    int result=a;
    while(b)
    {
        result=a^b;
        b=(a&b)<<1;
        a=result;
    }
    return result;
}
/**用位运算实现整数的减运算*/
int sub(int a,int b)
{
    return add(a,add(~b,1));
}
/**用位运算实现整数的乘运算*/
int mul(int a,int b)
{
    int result=0,flag=0;
    if(b&0x8000)
    {
        b=add(~b,1);
        flag=1;
    }
    while(b)
    {
        if(b&1)
            result=add(result,a);
        a<<=1;
        b>>=1;
    }
    if(flag)
        return add(~result,1);
    return result;
}
/**用位运算实现整数的除运算*/
int div(int a,int b)
{
    if(b)
    {
        int result=0,flag=0;
        if((a^b)&0x8000)
            flag=1;
        if(a&0x8000)
            a=add(~a,1);
        if(b&0x8000)
            b=add(~b,1);
        for(int i=31; i>=0; i=sub(i,1))
            if((a>>i)>=b)
            {
                result=add(result,1<<i);
                a=sub(a,b<<i);
            }
        if(flag)
            return add(~result,1);
        return result;
    }
    cout<<"除数为0！b=";
    return false;
}
int main()
{
    int a1=17,b1=5,a2=-17,b2=-5;
    /**位运算加法测试*/
    cout<<"***位运算加法测试***"<<endl;
    cout<<"a = "<<a1<<"   b = "<<b1<<"   a + b = "<<add(a1,b1)<<endl;
    cout<<"a = "<<a1<<"   b = "<<b2<<"   a + b = "<<add(a1,b2)<<endl;
    cout<<"a = "<<a2<<"   b = "<<b1<<"   a + b = "<<add(a2,b1)<<endl;
    cout<<"a = "<<a2<<"   b = "<<b2<<"   a + b = "<<add(a2,b2)<<endl;
    /**位运算减法测试*/
    cout<<"***位运算减法测试***"<<endl;
    cout<<"a = "<<a1<<"   b = "<<b1<<"   a - b = "<<sub(a1,b1)<<endl;
    cout<<"a = "<<a1<<"   b = "<<b2<<"   a - b = "<<sub(a1,b2)<<endl;
    cout<<"a = "<<a2<<"   b = "<<b1<<"   a - b = "<<sub(a2,b1)<<endl;
    cout<<"a = "<<a2<<"   b = "<<b2<<"   a - b = "<<sub(a2,b2)<<endl;
    /**位运算乘法测试*/
    cout<<"***位运算乘法测试***"<<endl;
    cout<<"a = "<<a1<<"   b = "<<b1<<"   a * b = "<<mul(a1,b1)<<endl;
    cout<<"a = "<<a1<<"   b = "<<b2<<"   a * b = "<<mul(a1,b2)<<endl;
    cout<<"a = "<<a2<<"   b = "<<b1<<"   a * b = "<<mul(a2,b1)<<endl;
    cout<<"a = "<<a2<<"   b = "<<b2<<"   a * b = "<<mul(a2,b2)<<endl;
    /**位运算除法测试*/
    cout<<"***位运算除法测试***"<<endl;
    cout<<"a = "<<a1<<"   b = "<<b1<<"   a / b = "<<div(a1,b1)<<endl;
    cout<<"a = "<<a1<<"   b = "<<b2<<"   a / b = "<<div(a1,b2)<<endl;
    cout<<"a = "<<a2<<"   b = "<<b1<<"   a / b = "<<div(a2,b1)<<endl;
    cout<<"a = "<<a2<<"   b = "<<b2<<"   a / b = "<<div(a2,b2)<<endl;
    return 0;

您的问题已经有小伙伴解答了，请点击【采纳】按钮，采纳帮您提供解决思路的答案，给回答的人一些鼓励哦～～

ps:开通问答VIP，享受5次/月 有问必答服务，了解详情↓↓↓

【电脑端】戳>>>  https://vip.csdn.net/askvip?utm_source=1146287632
【APP 】  戳>>>  https://mall.csdn.net/item/52471?utm_source=1146287632