三位数随机加减运算-专门练习线代计算！

亦凉 2023-07-03 02:57 16阅读 0赞

专门练习我的加减法，为了我的线性代数的计算不失误，便写了个程序，随机生成加减运算，略low，分享给计算失误的小朋友~

#include<stdio.h>
    #include <stdlib.h>
    #include <time.h>
    #include <conio.h>
    
    int main()
    { 
    	srand(time(NULL));
    	int a,b,c,t,z,result;
    	char ch1,ch2;
    	t=50;	//更改做题数量 
    	while(t)
    	{ 
    		t--; 		
    		a=rand()%11;
    		b=rand()%11;
    		c=rand()%11;
    		ch1=rand()%4;
    		ch2=rand()%4;
    		switch(ch1)
    		{ 	
    			case 0: ch1='+';ch2='-'; 
    					printf("%-2d %c %-2d %c %-2d = ",a,ch1,b,ch2,c);
    					scanf("%d",&z);
    					result=a+b-c;
    					if(z==result)
    						printf("恭喜！答对啦！继续加油哟！您还有%d道要做！\n\n",t); 
    					else
    					{ 
    						printf("呜呜，，答错了，您还有%d道要做！\n",t); 
    						printf("%-2d %c %-2d %c %-2d =%-2d\n\n",a,ch1,b,ch2,c,result);
    					} 	
    					break;
    			case 1: ch1='+';ch2='+';
    					printf("%-2d %c %-2d %c %-2d = ",a,ch1,b,ch2,c);
    					scanf("%d",&z);
    					result=a+b+c;
    					if(z==result)
    						printf("恭喜！答对啦！继续加油哟！您还有%d道要做！\n\n",t); 
    					else
    					{ 
    						printf("呜呜，，答错了，您还有%d道要做！\n",t); 
    						printf("%-2d %c %-2d %c %-2d = %-2d\n\n",a,ch1,b,ch2,c,result);
    					} 	
    					break;
    			case 2: ch1='-';ch2='+';
    					printf("%-2d %c %-2d %c %-2d = ",a,ch1,b,ch2,c);
    					scanf("%d",&z);
    					result=a-b+c;
    					if(z==result)
    						printf("恭喜！答对啦！继续加油哟！您还有%d道要做！\n\n",t); 
    					else
    					{ 
    						printf("呜呜，，答错了，您还有%d道要做！\n",t); 
    						printf("%-2d %c %-2d %c %-2d =%-2d\n\n",a,ch1,b,ch2,c,result);
    					} 	
    					break;
    			case 3: ch1='-';ch2='-';
    					printf("%-2d %c %-2d %c %-2d = ",a,ch1,b,ch2,c);
    					scanf("%d",&z);
    					result=a-b-c;
    					if(z==result)
    						printf("恭喜！答对啦！继续加油哟！您还有%d道要做！\n\n",t); 
    					else
    					{ 
    						printf("呜呜，，答错了，您还有%d道要做！\n",t); 
    						printf("%-2d %c %-2d %c %-2d =%-2d\n\n",a,ch1,b,ch2,c,result);
    					} 	
    					break;		
    		 } 		
    	}
    	return 0;
     }

// 生成指定范围的随机数的话就需要使用到求余运算符 %，  
// 这里有个规律：例如我们需要 0–10的随机数时，就写成 rand()%11，0–100就写成 rand()%101