#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<<"\t";

}

}

}

void DisplayInt(int a[],int w,int m)

{

if(w==1)

{

for(int q=0;q<m;q++)

{

cout<<a[q]<<"\t";

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);

}