四级运算C

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;

}

}

软件工程导论-3190704136