//根据相关选择自动生成100道四则运算
#include <iostream>
#include<cstdlib>
#include<time.h>
using namespace std;
void main()
{

int a0[1000],b0[1000],c0[1000],a1[1000],b1[1000],c1[1000],a2[1000],b2[1000],c2[1000],a3[1000],b3[1000],c3[1000],C[1000],a,b,c;
int i,j,A0,A1,A2,A3,B0,B1,B2,B3;
int num,line,k;
int min,max,m;
int CC,FS,YS;

k=0;
A0=0;A1=0;A2=0;A3=0;
B0=0;B1=0;B2=0;B3=0;
cout<<"*************四则运算*************"<<endl;
int count=0 ;
srand(time(NULL));//用系统当前时间设置rand()随机序列种子，保证运行随机序列不一样
char ch;
while(count<30)
{
cout<<"选择年级（1~5年级）"<<endl;
cin>>ch;
if(ch=='1') 
{cout<<"一年级四则运算："<<endl;
   
   break;
    }
if(ch=='2')
   {
    cout<<"二年级四则运算："<<endl;
       
       break;
    }
  if(ch=='3')
    {
    cout<<"三年级四则运算："<<endl;
       
       break;
    }
        
if(ch=='4')
    {
               cout<<"四年级四则运算："<<endl;
               
               break;
               }
                   
if(ch=='5')
   
              {cout<<"五年级四则运算："<<endl;
                 break;
              }
                  
}

cout<<"请依次输入算式数量和每行显示数量(用空格隔开)："<<endl;
cin>>num>>line;

cout<<"请问是否要有乘除法？有请输入\"1\"，无请输入\"0\""<<endl;
cin>>CC;
while(1)                             
{
    if(CC != 1&&CC != 0)
    {
        cout<<"输入不合法，请重新输入\"1\"或\"0\"：";
        cin>>CC;
    }
    else
        break;
}

cout<<"请问是否要加减结果有负数？有请输入\"1\"，无请输入\"0\""<<endl;
cin>>FS;
while(1)                             
{
    if(FS != 1&&FS != 0)
    {
        cout<<"输入不合法，请重新输入\"1\"或\"0\"：";
        cin>>FS;
    }
    else
        break;
}

cout<<"请问是否要除法结果有余数？有请输入\"1\"，无请输入\"0\""<<endl;
cin>>YS;
while(1)                          
{
    if(YS != 1&&YS != 0)
    {
        cout<<"输入不合法，请重新输入\"1\"或\"0\"：";
        cin>>YS;
    }
    else
        break;
}

cout<<"请输入两个值确定算式中a,b的取值（a<b）（及算数的取值范围）："<<endl;
cin>>min>>max;
while(1)                       
{
    if(min>=max)
    {
        cout<<"输入不合法，请重新输入：";
        cin>>min>>max;
    }
    else
        break;
}

m=max-min+1;
for(i=0;i<1000;i++)
{
    a0[i]=0;b0[i]=0;
    a1[i]=0;b1[i]=0;
    a2[i]=0;b2[i]=0;
    a3[i]=0;b3[i]=0;
}
for(i=0;;i++)
{
    a=min+rand()%m;
    b=min+rand()%m;
    c=rand()%4;
    if(CC==0)              //若CC=0，去除c=2,3的情况
    {
        if(c==2||c==3)
            continue;
    }
    if(FS==0)              //若FS=0，去除c=0,1下结果小于0的情况
    {
        if(c==0)
        {
            if(a+b<0)
                continue;
        }
        else if(c==1)
        {
            if(a-b<0)
                continue;
        }
    }
    if(YS==0)             //若YS=0，且是除法，去除a，b相除有余数的情况
    {
        if(c==3)
            if(0 != a%b)
                continue;
    }
    
    //将算式分为加、减、乘、除四组
    if(c==0)                       //加
    {
        for(j=0;j<=A0;j++)
        {
            if(a==a0[j]&&b==b0[j])
            {
                B0++;break;
            }
        }
        if(B0>0)
        {
            B0=0;continue;
        }
        else
        {
            a0[A0]=a;
            b0[A0]=b;
            c0[A0]=a+b;
            A0++;
        }
    }
    else if(c==1)                   //减
    {
        for(j=0;j<=A1;j++)
        {
            if(a==a1[j]&&b==b1[j])
            {
                B1++;break;
            }
        }
        if(B1>0)
        {
            B1=0;continue;
        }
        else
        {
            a1[A1]=a;
            b1[A1]=b;
            c1[A1]=a-b;
            A1++;
        }
    }
    else if(c==2)                     //乘
    {
        for(j=0;j<=A2;j++)
        {
            if(a==a2[j]&&b==b2[j])
            {
                B2++;break;
            }
        }
        if(B2>0)
        {
            B2=0;continue;
        }
        else
        {
            a2[A2]=a;
            b2[A2]=b;
            c2[A2]=a*b;
            A2++;
        }
    }
    else                               //除
    {
        if(b==0)
            continue;
        for(j=0;j<=A3;j++)
        {
            if(a==a3[j]&&b==b3[j])
            {
                B3++;break;
            }
        }
        if(B3>0)
        {
            B3=0;continue;
        }
        else
        {
            a3[A3]=a;
            b3[A3]=b;
            c3[A3]=a/b;
            A3++;
        }
    }
    if(num==A0+A1+A2+A3)                //限制算式数量
        break;
}
//输出
for(i=0;i<A0;i++)                        // 加
{
    k++;
    if(a0[i]<0)
        cout<<"("<<a0[i]<<")";
    else
        cout<<a0[i]<<" ";
    cout<<"+";
    if(b0[i]<0)
        cout<<"("<<b0[i]<<")";
    else
        cout<<" "<<b0[i]<<" ";
    cout<<"=";
    if(k%line==0)
        cout<<endl;
    else
        cout<<"\t";
}
for(i=0;i<A1;i++)                         // 减
{
    k++;
    if(a1[i]<0)
        cout<<"("<<a1[i]<<")";
    else
        cout<<a1[i]<<" ";
    cout<<"-";
    if(b1[i]<0)
        cout<<"("<<b1[i]<<")";
    else
        cout<<" "<<b1[i]<<" ";
    cout<<"=";
    if(k%line==0)
        cout<<endl;
    else
        cout<<"\t";
}
for(i=0;i<A2;i++)                         // 乘
{
    k++;
    if(a2[i]<0)
        cout<<"("<<a2[i]<<")";
    else
        cout<<a2[i]<<" ";
    cout<<"*";
    if(b2[i]<0)
        cout<<"("<<b2[i]<<")";
    else
        cout<<" "<<b2[i]<<" ";
    cout<<"=";
    if(k%line==0)
        cout<<endl;
    else
        cout<<"\t";
}
for(i=0;i<A3;i++)                         //除
{
    k++;
    if(a3[i]<0)
        cout<<"("<<a3[i]<<")";
    else
        cout<<a3[i]<<" ";
    cout<<"÷";
    if(b3[i]<0)
        cout<<"("<<b3[i]<<")";
    else
        cout<<" "<<b3[i]<<" ";
    cout<<"=";
    if(k%line==0)
        cout<<endl;
    else
        cout<<"\t";
}
cout<<"请依次输入结果："<<endl;
for(i=0;i<num;i++)
    cin>>C[i];
int t=0,corr=0;
//判断输入结果的对错
for(i=0;i<A0;i++)
{
    if(c0[i]==C[t])
    {t++;corr++;}
    else
    {
        t++;
        cout<<"第"<<t<<"题答错！"<<endl;
    }
}
for(i=0;i<A1;i++)
{
    if(c1[i]==C[t])
    {t++;corr++;}
    else
    {
        t++;
        cout<<"第"<<t<<"题答错！"<<endl;
    }
}
for(i=0;i<A2;i++)
{
    if(c2[i]==C[t])
    {t++;corr++;}
    else
    {
        t++;
        cout<<"第"<<t<<"题答错！"<<endl;
    }
}
for(i=0;i<A3;i++)
{
    if(c3[i]==C[t])
    {t++;corr++;}
    else
    {
        t++;
        cout<<"第"<<t<<"题答错！"<<endl;
    }
}
if(num==corr)
    cout<<"恭喜你，全部正确"<<endl;
system("pause");
}