#include<iostream.h>#include<stdlib.h>#include<conio.h>void DealFenshu(int m, int a[][2]){    for(int p=0;p<m;p++)    {        int i=(int)rand()%10;        int j=(int)rand()%10;        while(j==0||i>=j)        {            i=(int)rand()%10;            j=(int)rand()%10;        }        int x=(int)rand()%10;        int y=(int)rand()%10;        while(y==0||x>=y)        {            x=(int)rand()%10;            y=(int)rand()%10;        }        int k=(int)rand()%100/25;        switch(k)        {            case 0:                cout<<"("<<i<<"/"<<j<<")"<<"+"<<"("<<x<<"/"<<y<<")"<<"=";                a[p][0]=i*y+x*j;                a[p][1]=j*y;                break;            case 1:                cout<<"("<<i<<"/"<<j<<")"<<"-"<<"("<<x<<"/"<<y<<")"<<"=";                a[p][0]=i*y-x*j;                a[p][1]=j*y;                break;            case 2:                cout<<"("<<i<<"/"<<j<<")"<<"*"<<"("<<x<<"/"<<y<<")"<<"=";                a[p][0]=i*x;                a[p][1]=j*y;                break;            case 3:                a[p][0]=i*y;                a[p][1]=j*x;                cout<<"("<<i<<"/"<<j<<")"<<"/"<<"("<<x<<"/"<<y<<")"<<"=";            }                        if(p%5==4)            {                cout<<endl;            }            else            {                cout<<‘\t‘;            }    }}void DisplayFenshu(int a[][2],int w,int m){    if(w==1)    {        for(int q=0;q<m;q++)        {            if(a[q][0]==0)                cout<<"0"<<‘\t‘;            else                cout<<a[q][0]<<"/"<<a[q][1]<<‘\t‘;            if(q%5==4)            {                cout<<endl;            }        }    }    else    {};}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],b[1000][2];        int m,n,w;        cout<<"请输入生成的四则运算题个数：";        cin>>m;        cout<<endl;        cout<<"请输入要生成的四则运算种类(输入1为整数，否则为真分数):";        cin>>n;        cout<<endl;        if(n==1)        {            DealInt(m,a);            cout<<endl;        }        else        {            DealFenshu(m,b);            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(n==1)        {            DisplayInt(a,w,m);                }        else        {            DisplayFenshu(b,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);}

小学四则运算