四则运算升级版

#include <stdlib.h> 
#include <stdio.h> 
#include<time.h>
int main(void) 
{ 
int n=0,i,d=0,q,w,k,l,c=0,e,r,j;
float cout=0; 
char *a[6]={"+","-","*","/","(",")"};
char b;
printf("1.随机生成\n2.退出\n");
do{
	do{
		scanf("%d",&j);getchar();
		if((j>2)||(j<1))
			printf("输入错误，请重新输入:");
	}while((j>2)||(j<1));
	
switch(j){
case 1:
	printf("开始生成\n"); 
	printf("产生题数:"); 
		do{
		scanf("%d",&n);getchar();
		if(n==0)
			printf("输入错误，请重新输入:");
	}while(n==0);
	printf("输入控制数字范围:");
		do{
		scanf("%d",&c);getchar();
		if(c==0)
			printf("输入错误，请重新输入:");
	}while(c==0);
	c++;
	cout=0.0;
	srand(time(NULL));
	for(d=0;d<n;d++){
	i=rand() % 8;
	q=rand() % c;
	w=rand() % c;
	switch(i)
	{
		case 1:
		printf("%d+%d=",q,w);
		scanf("%d",&k);
			if(k==(q+w)){
				printf("恭喜回答正确! 得%d分!\n",100/n);
				cout+=(100/n);
			}
			else
				printf("回答错误，继续加油!\n");
		break;
		case 2:
		printf("%d-%d=\n",q,w);
				scanf("%d",&k);
			if(k==(q-w)){
				printf("恭喜回答正确! 得%d分!\n",100/n);
				cout+=(100/n);
			}
			else
				printf("回答错误，继续加油!\n");
		break;
		case 3:
			printf("%d*%d=\n",q,w);
				scanf("%d",&k);
			if(k==(q*w)){
				printf("恭喜回答正确! 得%d分!\n",100/n);
				cout+=(100/n);
			}
			else
				printf("回答错误，继续加油!\n");
			break;
		case 4:
			do{
			if(w==0)
				w=rand() % c;}while(w==0);
			printf("%d/%d=\n",q,w);
			printf("1.答案为整数\n2.答案为分数\n");
			scanf("%d",&k);
			switch(k){
				case 1:
					scanf("%d",&k);
				if(k==(q/w)){
					printf("恭喜回答正确! 得%d分!\n",100/n);
					cout+=(100/n);
				}
				else
					printf("回答错误，继续加油!\n");
				break;
				case 2:
					scanf("%d",&k);
					scanf("%c",&b);
					getchar();
					scanf("%d",&l);
					if((k/l)==(q/w)){
					printf("恭喜回答正确! 得%d分!\n",100/n);
					cout+=(100/n);
					}
					else
					printf("回答错误，继续加油!\n");
				break;
				default:
					printf("默认整数\n");
					scanf("%d",&k);
					if(k==(q/w)){
					printf("恭喜回答正确! 得%d分!\n",100/n);
					cout+=(100/n);
					}
					else
						printf("回答错误，继续加油!\n");
					break;
					}
				break;
		case 5:
			e=rand() % c;
			r=rand() % c;
			do{
			if(w==0||r==0)
				w=rand() % c;	r=rand() % c;
			}while(w==0||r==0);
			printf("(%d/%d)+(%d/%d)=\n",q,w,e,r);
			printf("1.答案为整数\n2.答案为分数\n");
			scanf("%d",&k);
			switch(k){
				case 1:
					scanf("%d",&k);
				if(k==((q/w)+(e/r))){
					printf("恭喜回答正确! 得%d分!\n",100/n);
					cout+=(100/n);
				}
				else
					printf("回答错误，继续加油!\n");
				break;
				case 2:
					scanf("%d",&k);
					scanf("%c",&b);
					getchar();
					scanf("%d",&l);
					if((k/l)==((q/w)+(e/r))){
					printf("恭喜回答正确! 得%d分!\n",100/n);
					cout+=(100/n);
					}
					else
					printf("回答错误，继续加油!\n");
				break;
				default:
					printf("默认整数\n");
					scanf("%d",&k);
					if(k==((q/w)+(e/r))){
					printf("恭喜回答正确! 得%d分!\n",100/n);
					cout+=(100/n);
					}
					else
						printf("回答错误，继续加油!\n");
					break;
					}
				break;
			case 6:
				e=rand() % c;
				r=rand() % c;
				do{
				if(w==0||r==0)
					w=rand() % c;	r=rand() % c;
				}while(w==0||r==0);
				printf("(%d/%d)-(%d/%d)=\n",q,w,e,r);
				printf("1.答案为整数\n2.答案为分数\n");
				scanf("%d",&k);
				switch(k){
					case 1:
						scanf("%d",&k);
						if(k==((q/w)-(e/r))){
						printf("恭喜回答正确! 得%d分!\n",100/n);
						cout+=(100/n);
						}
						else
						printf("回答错误，继续加油!\n");
					break;
					case 2:
						scanf("%d",&k);
						scanf("%c",&b);
						getchar();
						scanf("%d",&l);
						if((k/l)==((q/w)-(e/r))){
						printf("恭喜回答正确! 得%d分!\n",100/n);
						cout+=(100/n);
						}
					else
						printf("回答错误，继续加油!\n");
					break;
					default:
						printf("默认整数\n");
						scanf("%d",&k);
						if(k==((q/w)-(e/r))){
						printf("恭喜回答正确! 得%d分!\n",100/n);
						cout+=(100/n);
						}
					else
						printf("回答错误，继续加油!\n");
					break;
					}
				break;
			case 7:
				e=rand() % c;
				r=rand() % c;
				do{
				if(w==0||r==0)
					w=rand() % c;	r=rand() % c;
				}while(w==0||r==0);
				printf("(%d/%d)*(%d/%d)=\n",q,w,e,r);
				printf("1.答案为整数\n2.答案为分数\n");
				scanf("%d",&k);
				switch(k){
					case 1:
						scanf("%d",&k);
						if(k==((q/w)*(e/r))){
						printf("恭喜回答正确! 得%d分!\n",100/n);
						cout+=(100/n);
						}
						else
						printf("回答错误，继续加油!\n");
					break;
					case 2:
						scanf("%d",&k);
						scanf("%c",&b);
						getchar();
						scanf("%d",&l);
						if((k/l)==((q/w)*(e/r))){
						printf("恭喜回答正确! 得%d分!\n",100/n);
						cout+=(100/n);
						}
					else
						printf("回答错误，继续加油!\n");
					break;
					default:
						printf("默认整数\n");
						scanf("%d",&k);
						if(k==((q/w)*(e/r))){
						printf("恭喜回答正确! 得%d分!\n",100/n);
						cout+=(100/n);
						}
					else
						printf("回答错误，继续加油!\n");
					break;
					}
				break;
			case 0:
				e=rand() % c;
				r=rand() % c;
				do{
				if(w==0||r==0)
					w=rand() % c;	r=rand() % c;
				}while(w==0||r==0);
				printf("(%d/%d)/(%d/%d)=\n",q,w,e,r);
				printf("1.答案为整数\n2.答案为分数\n");
				scanf("%d",&k);
				switch(k){
					case 1:
						scanf("%d",&k);
						if(k==((q/w)/(e/r))){
						printf("恭喜回答正确! 得%d分!\n",100/n);
						cout+=(100/n);
						}
						else
						printf("回答错误，继续加油!\n");
					break;
					case 2:
						scanf("%d",&k);
						scanf("%c",&b);
						getchar();
						scanf("%d",&l);
						if((k/l)==((q/w)/(e/r))){
						printf("恭喜回答正确! 得%d分!\n",100/n);
						cout+=(100/n);
						}
					else
						printf("回答错误，继续加油!\n");
					break;
					default:
						printf("默认整数\n");
						scanf("%d",&k);
						if(k==((q/w)/(e/r))){
						printf("恭喜回答正确! 得%d分!\n",100/n);
						cout+=(100/n);
						}
					else
						printf("回答错误，继续加油!\n");
					break;
					}
				break;
	}
	}
	printf("总成绩%0.1f!\n",cout);
	j=-1;
	printf("\n1.随机生成\n2.退出\n");
	break;
case 2:
	exit(0);
	break;
default:
	printf("输入错误!请重新输入\n");
	break;
}}while(j==-1);
return 0; 
}