四则运算源程序

//四则运算程序，支持真分数运算
//2016,03,04

#include<iostream>
#include<stdlib.h>
#include<time.h>
using namespace std;

void zuidagongyue(int chushu)
{
 int beichushu = 100;
 int temp;
 int first = beichushu%chushu;
 while (!first == 0)
 {
  temp = chushu;
  chushu = beichushu%chushu;
  beichushu = temp;
  first = beichushu%chushu;
 }
}

void main()
{
 srand((int)time(NULL));

int A[30];
 int B[30];
 for (int i = 0; i < 30; i++)
 {
  A[i] = 1+rand() % 99;

cout << A[i]<<" " ;

B[i] = 1+rand() % 99;

cout << B[i]<<" " ;
  cout << endl;
 }
 for (int i = 0; i < 30; i++)
 {
  if (A[i] > B[i])
  {
   int suanfu = rand() % 4;
   switch (suanfu)
   {
   case 0:
    cout << A[i] << " + " << B[i] << "=" << endl; break;
   case 1:
    cout << A[i] << " - " << B[i] << "=" << endl; break;
   case 2:
    cout << A[i] << " x " << B[i] << "=" << endl; break;
   case 3:
    cout << A[i] << " ÷ " << B[i] << "=" << endl; break;
   }
  }
  if (A[i] < B[i])
  {
   int copyA = A[i];
   int copyB = B[i];
   zuidagongyue(A[i]);
   zuidagongyue(B[i]);
   int suanfu = rand() % 4;
   switch (suanfu)
   {
   case 0:
    cout << copyA / A[i] << "/" << 100 / A[i] << " + " << copyB / B[i] << "/" << 100 / B[i] << "=" << endl; break;
   case 1:
    cout << copyA / A[i] << "/" << 100 / A[i] << " - " << copyB / B[i] << "/" << 100 / B[i] << "=" << endl; break;
   case 2:
    cout << copyA / A[i] << "/" << 100 / A[i] << " x " << copyB / B[i] << "/" << 100 / B[i] << "=" << endl; break;
   case 3:
    cout << copyA / A[i] << "/" << 100 / A[i] << " ÷ " << copyB / B[i] << "/" << 100 / B[i] << "=" << endl; break;
   }
  }
 }
}