实验1

#include <stdio.h>
#include <ctype.h>
#include <time.h>
#include <stdlib.h>
#include <windows.h>
#define IDNO_LENGTH 6
#define CALC_KIND 4

char getSignal();
int getResult(int,int,char);
void takeTest();
void falsePrint(int);
void correctPrint(int);

//main函数
void main()
{
while(1)
{
takeTest();
}

}

//获取随机运算符
char getSignal()
{
char signal[CALC_KIND]={'+','-','*','/'};
srand((unsigned)time(NULL));
return signal[rand()%4];
}

//获取随机数
int random(double start, double end)
{
return (int)(start+(end-start)*rand()/(RAND_MAX+ 1.0));
}

//运算
int getResult(int num1,int num2,char signal)
{
int res;
switch(signal)
{
case '+':
res=num1+num2;break;
case '-':
res=num1-num2;break;
case '*':
res=num1*num2;break;
case '/':
res=num1/num2;break;
default:
res=0;
printf("运算符不符合规则\n");
}
return res;
}

//列出题目
void takeTest()
{
int giveRes;
int num1;
int num2;
char signal;
int printFlag;

srand((unsigned)time(NULL));
signal=getSignal();
num1=random(0,100);
num2=random(1,100);

if(signal=='-')
{
if(num1<num2)
{
int temp;
temp=num1;
num1=num2;
num2=temp;
}
}

if(signal=='/')
{
if(num2==0)
{
int temp;
temp=num1;
num1=num2;
num2=temp;
}
}

printf("%d%c%d=",num1,signal,num2);
scanf("%d",&giveRes);
fflush(stdin);

if(getResult(num1,num2,signal)==giveRes)
{
printFlag=random(1,5);
correctPrint(printFlag);
}
else
{
printFlag=random(1,4);
falsePrint(printFlag);
printf("正确答案：%d\n",getResult(num1,num2,signal));
}
}

//回答正确打印信息
void correctPrint(int num)
{
switch(num)
{
case 1:
printf("You're right!\n");break;
case 2:
printf("It's OK!\n");break;
case 3:
printf("Correct!\n");break;
case 4:
printf("Perfect!\n");break;
case 5:
printf("Good!\n");break;
default:
printf("Powerful!\n");break;
}
}

//回答错误打印信息
void falsePrint(int num)
{
switch(num)
{
case 1:
printf("You're lost!");break;
case 2:
printf("Failure!");break;
case 3:
printf("Come on!");break;
case 4:
printf("It's wrong!");break;
default:
printf("Incorrect!");break;
}
}