四则运算3.0版本

Posted 2021-01-15 miniarcher

最新要求：在线答题、答题结束后可以判断对错和保存结果

预计时间：五小时

实际时间：周四 第四第五节课

                周五晚 18：30-20：00

                 周日  15：30-16：30

#include<iostream.h>
#include<stdlib.h>
#include<time.h>
void boom()
{
float x,y;
int z,t;
int first_num,second_num,third_num,fourth_num;
srand(time(NULL));
int n;
float k;
float d;
float daan[100];
int zq=0;
int cw=0;
cout<<"需要列出多少到数学题?"<<endl;
cin>>n;
       for(int i=0;i<n;i++)
 {
      z=rand()%4;
      first_num=rand()%10;
      second_num=rand()%10;
      third_num=rand()%10;
      fourth_num=rand()%10;
   if (second_num==1)
   {
   x=(float)first_num;
   }
  else if(first_num>second_num)
  {
 t=first_num;
 first_num=second_num;
 second_num=t;
  }
x=(float)first_num/second_num;
if (fourth_num==1)
{
y=(float)third_num;
}
else if(third_num>fourth_num)
{
t=third_num;
third_num=fourth_num;
fourth_num=t;
}
y=(float)third_num/fourth_num;
z=rand()%4;
     switch(z)
  {
      case 0:
        cout<<i+1<<"、 "<<first_num<<"/"<<second_num<<"+"<<third_num<<"/"<<fourth_num<<"="<<" ";
        daan[i+1]=x+y;
      break;
      case 1:
      cout<<i+1<<"、 "<<first_num<<"/"<<second_num<<"-"<<third_num<<"/"<<fourth_num<<"="<<" ";
      daan[i+1]=x-y;
      break;
      case 2:
      cout<<i+1<<"、 "<<first_num<<"/"<<second_num<<"*"<<third_num<<"/"<<fourth_num<<"="<<" ";
      daan[i+1]=x*y;
      break;
      case 3:
       if(y!=0)
    {
        cout<<i+1<<"、 "<<first_num<<"/"<<second_num<<"÷"<<third_num<<"/"<<fourth_num<<"="<<" ";
    }
       else
    {
         i=i-1;
    }
daan[i+1]=(float)x/y;
break;
}
   if((i+1)%3==0)
   {
     for(int c=0;c<=1;c++)
  {
       cout<<endl;
  }
   }
   if((i+1)==n)
   {
     cout<<endl;
   }
    }
     for(i=1;i<=n;i++)
  {
       cout<<"请作答:"<<endl;
       cout<<i<<"、";
       cin>>d;
    if(d==daan[i])
 {
      cout<<"回答正确！"<<endl;
      cout<<endl;
      zq=zq+1;
 }
    else
 {
cout<<"回答错误，正确答案为："<<" "<<daan[i]<<endl;
cout<<endl;
cw=cw+1;
}
}
k=(float)zq/n;
cout<<"回答正确的数量为："<<" "<<zq<<"个"<<endl;
cout<<"回答错误的数量为："<<" "<<cw<<"个"<<endl;
cout<<"正确率为："<<" "<<k<<endl;
}
int main()
{
boom();
main();
return 0;
}

 

缺点：有时候答案输入正确可能因为空格会报错如图，，还有就是出现了无难度的题目，就是分子是0时候的乘法题。需要加以改进。

结果截图：