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;
}