#include<iostream.h>
#include<stdlib.h>
void DealInt(int m,int a[])
{
for(int p=0;p<m;p++)
{
int i=(int)rand()%10;
int j=(int)rand()%10;
int k=(int)rand()%100/25;
switch(k)
{
case 0:
cout<<i<<"+"<<j<<"=";
a[p]=i+j;
break;
case 1:
cout<<i<<"-"<<j<<"=";
a[p]=i-j;
break;
case 2:
cout<<i<<"*"<<j<<"=";
a[p]=i*j;
break;
case 3:
try
{
a[p]=i/j;
cout<<i<<"/"<<j<<"=";
}
catch(...)
{
p--;
}
}
if(p%5==4)
{
cout<<endl;
}
else
{
cout<<" ";
}
}
}
void DisplayInt(int a[],int w,int m)
{
if(w==1)
{
for(int q=0;q<m;q++)
{
cout<<a[q]<<" ";
if(q%5==4)
{
cout<<endl;
}
}
}
else
{};
}
void main()
{
int p;
do
{
system("cls");
int a[1000];
int m,w;
cout<<"请输入生成的四则运算题个数：";
cin>>m;
cout<<endl;
DealInt(m,a);
cout<<endl;
cout<<"是否输出答案(输入1则输出答案否则不输出答案)"<<endl;
cin>>w;
if(w==1)
{
DisplayInt(a,w,m);
}
cout<<endl;
cout<<"是否继续生成运算题(输入1则生成否则不生成)"<<endl;
cin>>p;
cout<<endl;
}while(1==p);
}