对二柱子的项目完成更新

题目要求：1，实现在线答题；

2，答题结束后，可以判断对错；

3，并将错题的结果保存起来。

实验过程：

   #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;
cout<<"********************************"<<endl;
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<<"恭喜您，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();
int c;
cout<<"要继续答题吗？（0：继续 1：退出）"<<endl;
   cin>>c;
if(c==0)
{
cout<<endl;
main();
   }
else
   {
   cout<<endl;
return 0;
   }

   return 0;
}

实验结果：

对二柱子的项目完成更新

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