个人项目--四则运算

本程序由我个人用C语言独立编写完成，能自动生成整数及真分数的四则运算，同时避免了负数的结果出现，也避免了除数为0的情况。




#include<stdio.h>
#include<math.h>
#include<stdlib.h>
#include<time.h>

int main()
{
	
    int c=0;

 srand((unsigned int)time(NULL));
 int d;
 while(c<30)
 {
	printf("
------ 四则运算------
");  
  
         printf("1. 整数四则运算
");  
  
         printf("2. 真分数四则运算
");  
  
         printf("请输入1-2选择:");  
		 scanf("%d",&d);
	if(d==1)
	{
		printf("开始产生整数四则运算:");
		int a=0;
		int b=0;
		int sum=0;
		int ANSWER=0;
		
		a=0+rand()%10;
		b=0+rand()%10;
		
		int fu=0;
	   
		fu=((0+rand()%4)+4)%4;
		//printf("%d",fu);

	
        while(a<b&&fu==1)
		{           
	        a=0+rand()%10;
			b=0+rand()%10;
		}
	
		while(b==0&&fu==3)
		{
            a=0+rand()%10;
			b=0+rand()%10;
		}
		switch(fu)
		{
		case 0:printf("%d+%d=",a,b);
			   scanf("%d",&ANSWER);
 
			break;
		case 1:printf("%d-%d=",a,b);
               scanf("%d",&ANSWER);
			break;
        case 2:printf("%d*%d=",a,b);
               scanf("%d",&ANSWER);  
			break;
		case 3:printf("%d/%d=",a,b);
               scanf("%d",&ANSWER);
			break;
		}
	}




		 if(d==2)
		 {
			printf("开始产生真分数四则运算:");
			int x=0,y=0,g=0,h=0,fu=0;
			int ANSWER=0;

			x=0+rand()%10;
			y=0+rand()%10;

			while(y==0||x>y)
			{
            x=0+rand()%10;
			y=0+rand()%10;
			}

            g=0+rand()%10;
			h=0+rand()%10;

			while(h==0||g==0||g>h)
			{
			g=0+rand()%10;
			h=0+rand()%10;
			}
		
         fu=((0+rand()%4)+4)%4;
		 //printf("%d",fu);
		 
	while((x/y)<(g/h)&&fu==2)
		{
			g=0+rand()%10;
            h=0+rand()%10;
		}

	switch(fu)
		{
		case 0:printf("%d/%d+%d/%d=", x,y,g,h);
               scanf("%d",&ANSWER);
			break;
		case 1:printf("%d/%d-%d/%d=", x,y,g,h);
               scanf("%d",&ANSWER);
			break;
        case 2:printf("%d/%d*%d/%d=",x,y,g,h);
			   scanf("%d",&ANSWER); 
			break;
		case 3:printf("%d/%d/%d/%d=", x,y,g,h);
               scanf("%d",&ANSWER);
			break;

	}
		 }
	
		 }
 c++;
	}