其实是赶作业的产物，做的十分粗糙，错漏也存在，但姑且算是完成了吧，下次不能到最后时间才行动了。

by c language

#include "stdafx.h"

#include "time.h"

#include "stdlib.h"

int randnum(int numlv)

{

int num;

num = rand() % numlv;

return num;

}

int randsym(int symly)

{

int sym;

sym = rand() % symly+1;

return sym;

}

int _tmain(int argc, _TCHAR* argv[])

{

int a, b, s, nlv, slv,sym,num=0,rt=0,wr=0;

srand(time(NULL));

printf_s("请输入数字上限\n");

scanf_s("%d", &nlv);

printf_s("请输入算符等级（1.二则，2.四则）");

scanf_s("%d", &slv);

while (num != -1)

{

a = randnum(nlv);

sym = randsym(slv);

b = randnum(nlv);

if ((a - b) < 0 )

sym = 5;

if (sym == 4)

{

if (b == 0)

sym = 5;

if (a / b != 0)

sym = 5;

}

switch (sym)

{

case 1:s = a + b;

printf_s("%d+%d=", a, b);

break;

case 2:s = a - b;

printf_s("%d-%d=", a, b);

break;

case 3:s = a * b;

printf_s("%d*%d=", a, b);

break;

case 4:s = a / b;

printf_s("%d/%d=", a, b);

break;

default:break;

}

if (sym != 5)

{

scanf_s("%d", &num);

if (num == s)

{

printf_s("right!\n");

rt++;

}

else

{

printf_s("wrong!\n");

wr++;

}

}

}

printf_s("总共做了%d个题，正确%d个，错误%d个",rt+wr-1,rt,wr -1);

scanf_s("%d", &a);

return 0;

}

 程序不是重点，主要是学习使用GIT。