四则运算3

1.实验题目：

让程序能接受用户输入答案，并判定对错。最后给出总共对/错 的数量。

2.设计思路：

定义两个数组，把计算结果存入其中一个，把用户自己写的答案存入另一个数组，比较是否相等，从而求出正确与错误题目的个数。

3.源代码：

#include<iostream.h>
#include<stdlib.h>
#include<time.h>
void choice2();
void create(int m,int n){
    int a,b,c;
    a=rand()%n;
    b=rand()%n;
    c=rand()%m;
    switch(c){
    case 0:
        cout<<a<<"+"<<b<<"="<<endl;
        break;
    case 1:
        if(a>b)
        {
            cout<<a<<"-"<<b<<"="<<endl;
        }
        else
        {
            cout<<b<<"-"<<a<<"="<<endl;
        }
        break;
    case 2:
        cout<<a<<"*"<<b<<"="<<endl;
        break;
    case 3:
        if(b!=0)
        {
            cout<<a<<"/"<<b<<"="<<endl;
        }
        else
        {
            cout<<"这道题有误！"<<endl;
        }
        break;
    }
}
void caidan()
{
    cout<<"----四则运算2-----"<<endl;
    cout<<"1. 定制出题数量"<<endl;
    cout<<"2. 出题打印"<<endl;
    cout<<"3. 退出菜单"<<endl;
}
void caidan2()
{
    cout<<"----四则运算2----"<<endl;
    cout<<"1. 乘除法选择"<<endl;
    cout<<"2. 数值范围选择"<<endl;
    cout<<"3. 余数有无选择"<<endl;
    cout<<"4. 打印间隔选择"<<endl;
    cout<<"5. 退出菜单"<<endl;
}
void choice()
{
    int xuanze,num;
    caidan();
    cout<<"输入您的选择："<<endl;
    cin>>xuanze;
    while(xuanze!=3)
    {
        switch(xuanze)
        {
        case 1:
            cout<<"请输入您想定制的数量："<<endl;
            cin>>num;
            caidan();
            cin>>xuanze;
            break;
        case 2:
            cout<<"出题打印!"<<endl;
            choice2();
            break;
        default:
            cout<<"输入有误!请重新输入!"<<endl;
            caidan();
            cin>>xuanze;
            break;
        }
    }
}
void choice2()
{
    int key,k1,k2,k3,k4,num,k,a,b,c;
    int count1=0;
    int count2=0;
    int jg;
    int ans;
    caidan2();
    cout<<"请输入您的选择："<<endl;
    cin>>key;
    while(key)
    {
        switch(key)
        {
        case 1:
            cout<<"请输入0或1(0代表有乘除，1代表无乘除!)"<<endl;
            cin>>k1;
            if(k1==0)
            {
                cout<<"请输入你想定制的数量:"<<endl;
                cin>>num;
                for(int i=0;i<num;i++)
                {
                    int n=100;
                    int m=4;
                    a=rand()%n;
                    b=rand()%n;
                    c=rand()%m;    
                    switch(c){
                    case 0:
                        {
                            cout<<i<<")"<<a<<"+"<<b<<"="<<endl;
                            jg=a+b;
                            cout<<"输入你想的答案:"<<endl;
                        cin>>ans;
                        if(ans==jg){
                            cout<<"正确!"<<endl;
                            count1++;
                        }
                        else{
                            cout<<"错误!"<<endl;
                            count2++;
                        }
                        }
                        break;
                    case 1:
                        if(a>b)
                        {
                            cout<<i<<")"<<a<<"-"<<b<<"="<<endl;
                            jg=a-b;
                            cout<<"输入你想的答案:"<<endl;
                        cin>>ans;
                        if(ans==jg){
                            cout<<"正确!"<<endl;
                            count1++;
                        }
                        else{
                            cout<<"错误!"<<endl;
                            count2++;
                        }
                        }
                        else
                        {
                            cout<<i<<")"<<b<<"-"<<a<<"="<<endl;
                            jg=b-a;
                            cout<<"输入你想的答案:"<<endl;
                        cin>>ans;
                        if(ans==jg){
                            cout<<"正确!"<<endl;
                            count1++;
                        }
                        else{
                            cout<<"错误!"<<endl;
                            count2++;
                        }
                        }
                        break;
                    case 2:
                        {
                            cout<<i<<")"<<a<<"*"<<b<<"="<<endl;
                            jg=a*b;
                            cout<<"输入你想的答案:"<<endl;
                        cin>>ans;
                        if(ans==jg){
                            cout<<"正确!"<<endl;
                            count1++;
                        }
                        else{
                            cout<<"错误!"<<endl;
                            count2++;
                        }
                        }
                        break;
                    case 3:
                        if(b!=0)
                        {
                            cout<<i<<")"<<a<<"/"<<b<<"="<<endl;
                            jg=a/b;
                            cout<<"输入你想的答案:"<<endl;
                        cin>>ans;
                        if(ans==jg){
                            cout<<"正确!"<<endl;
                            count1++;
                        }
                        else{
                            cout<<"错误!"<<endl;
                            count2++;
                        }
                        }
                        else
                        {
                            cout<<"这道题有误！"<<endl;
                        }
                        break;

                    
                        cout<<"答对共"<<count1<<"题"<<endl;
                        cout<<"答错共"<<count2<<"题"<<endl;
                    }
                    }
cout<<"答对共"<<count1<<"题"<<endl;
                        cout<<"答错共"<<count2<<"题"<<endl;
            }
        
            
            else if(k1==1)
            {
                cout<<"请输入你想定制的数量:"<<endl;
                cin>>num;
                for(int i=0;i<num;i++){
                    create(2,100);
                }
            }
            else
            {
                cout<<"输入有误!请重输:"<<endl;
                cin>>k1;
            }
            caidan2();
            cin>>key;
            break;
        case 2:
            {
                cout<<"请输入出题数值范围(数值范围默认100以内)"<<endl;
                cin>>k2;
                cout<<"请输入你想定制的数量:"<<endl;
                cin>>num;
                for(int i=0;i<num;i++){
                    create(4,k2);
                }
                caidan2();
                cin>>key;
                break;
            }
        case 3:
            cout<<"请输入0或1(0代表有余数，1代表无余数!)"<<endl;
            cin>>k3;
            
            if(k3==0)
            {
                cout<<"请输入出题数值范围(数值范围默认100以内)"<<endl;
                cin>>k2;
                cout<<"请输入你想定制的数量:"<<endl;
                cin>>num;
                int a=rand()%k2;
                int b=rand()%k2;
                
                if(a%b==0)
                {
                    srand(time(NULL));
                    a=rand()%k2;
                    b=rand()%k2;
                    for(int i=0;i<num;i++){
                        create(4,k2);}
                }
                else
                {
                    for(int i=0;i<num;i++){
                        create(4,k2);}
                }
            }
            else if(k3==1)
            {
                cout<<"请输入出题数值范围(数值范围默认100以内)"<<endl;
                cin>>k2;
                cout<<"请输入你想定制的数量:"<<endl;
                cin>>num;
                int a=rand()%k2;
                int b=rand()%k2;
                
                if(a%b==0)
                {
                    srand(time(NULL));
                    a=rand()%k2;
                    b=rand()%k2;
                    for(int i=0;i<num;i++){
                        create(4,k2);}
                }
                else
                {
                    for(int i=0;i<num;i++){
                        create(4,k2);}
                }
            }
            caidan2();
            cin>>key;
            break;
        case 4:
            {
                cout<<"请输入您想打印时的间隔:"<<endl;
                cin>>k4;
                cout<<"请输入你想定制的数量:"<<endl;
                cin>>num;
                for(int i=0;i<num;i++)
                {
                    create(4,100);
                    for(int j=0;j<k4;j++)
                    {
                        cout<<"	";
                    }
                }
                caidan2();
                break;
            }
        case 5:
            exit(1);
        default:
            cout<<"输入有误!请重新输入!"<<endl;
            caidan2();
            cin>>key;
            break;
        }
    }
}
void main()
{
    int xuanze;
    choice();
    if(xuanze==2)
    {
        choice2();
    }
}

4.结果截图：

 

5.实验总结：

程序本身存在一些不足，但我相信用户使用起来效果应该不错。对于界面化的实现，日后还应该更加努力吧。

6.psp：