四则运算器的实现

此次作业要求：编写一个能实现四则运算的计算器。

当选择整数时会有十道题目，如果做对会提示“恭喜你答对了做的不错！“如果做错会提示"答案错误请继续努力”十道题都做完时会出现成绩和分数，整数和退出选项。

分数四则运算里会有随机的题供做后面是答案可以参考。

退出选项点击后会有个再见的文字界面。

#include<stdafx.h>
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<math.h>
void Shengcheng();
void Simple();
void real();
void result();
int MaxGYS(int a, int b);
int system(const char *string);

int main(void)
{
int n;
Loop1: printf("\n\n\n\n\t\t\t耿丹13计科-1黄云龙\n\n\t\t\t[1] 小学数学无分数十道四则运算练习题\n\n\t\t\t[2]小学数学分数四则运算练习题\n\n\t\t\t[3] 退出程序\n\n\t\t\t请输入相应的选项,按回车键确定:");
    scanf_s("%d", &n);
    system("cls");
if (n == 1)
        Shengcheng();//到整数十道题界面
else
if (n == 2)
            result();//分数界面
else
if (n == 3)
        {
            printf("\n\n\n\n\n\n\t\t再见\n\n\t\t");//退出界面
return 0;
        }
else
            printf("输入错误请重新输入");//错误提示
goto Loop1;//回到主界面
return 0;
}

void Shengcheng()//整数十道运算随机题
{
int i, a, b, p, q, r, c, sum = 0, d = 0, e = 0;
    srand((unsigned)time(NULL));
    printf("请做下面十道四则运算题，加油哦！\n\n");
for (i = 0; i < 10; i++)
   {
        a = rand() % 50;
        b = rand() % 50;
        p = rand() % 50;
        q = rand() % 50;
        r = rand() % 50;
while (r == 0)
        {
            i--;
        }
while (r != 0)
        {
            printf("请输入你的答案：%d+%d-%d*%d/%d=", a, b, p, q, r);
            scanf_s("%d", &c);
            printf("\n");
if ((a + b - p*q / r) == c)

            {
                printf("恭喜你答对了！干的不错！\n\n");
                sum = sum + 10;
                e = e + 1;
            }
else
            {
                printf("答案错误！请继续努力！\n\n");
                d = d + 1;
            }
break;//返回
        }
continue;
    }
    printf("你总共答对了%d道题，答错了%d道题。\n\n", e, d);

    printf("你的得分为：%d分继续努力哟！\n\n", sum);
return ;
}

void Simple()
{
int m, b, c, d, t;
    m = rand() % 3 + 1;
    b = rand() % 20 + 1;
    c = rand() % 20 + 1;
switch (m)
    {
case 1: {
        d = b + c;
        printf("%d+%d=\t\t\t\t\t\t\t\t\t%d\n", b, c, d);
    }break;
case 2: {
if (b>c)
        {
            t = b;
            b = c;
            c = t;
        }
        d = b - c;
        printf("%d-%d=\t\t\t\t\t\t\t\t\t%d\n", b, c, d);
    }break;
case 3: {
        d = b*c;
        m = rand() % 2 + 1;
if (m == 1)
            printf("%d*%d=\t\t\t\t\t\t\t\t\t%d\n", b, c, d);
else
            printf("%d/%d=\t\t\t\t\t\t\t\t\t%d\n", d, b, c);
    } break;
    }
return;
}
void real()//分子分母
{
int a, b, c, d, e, f, g, h, t;
    a = rand() % 4 + 1;
    b = rand() % 9 + 1;//第一个数字分子
    c = rand() % 9 + 1;//第一个数字分母
    d = rand() % 9 + 1;//第二个数字分子
    e = rand() % 9 + 1;//第二个数字分母
if (b>c)
    {
        t = b;
        b = c;
        c = t;
    }
if (d>e)
    {
        t = d;
        d = e;
        e = t;
    }
switch (a)
    {
case 1: {
        f = c*e;
        g = b*e + d*c;
        h = MaxGYS(g, f);
        f = f / h;
        g = g / h;
        printf("(%d/%d)+(%d/%d)=\t\t\t\t\t\t\t\t(%d/%d)\n", b, c, d, e, g, f);
    }break;
case 2: {
        f = c*e;
        g = b*e - d*c;
if (g>0)
        {
            h = MaxGYS(g, f);
            f = f / h;
            g = g / h;
            printf("(%d/%d)-(%d/%d)=\t\t\t\t\t\t\t\t(%d/%d)\n", b, c, d, e, g, f);
        }
else
        {
            g = abs(g);
            h = MaxGYS(g, f);
            f = f / h;
            g = g / h;
            printf("(%d/%d)-(%d/%d)=\t\t\t\t\t\t\t\t(%d/%d)\n", d, e, b, c, g, f);
        }
    }break;
case 3: {
        f = c*e;
        g = b*d;
        h = MaxGYS(g, f);
        f = f / h;
        g = g / h;
        printf("(%d/%d)*(%d/%d)=\t\t\t\t\t\t\t\t(%d/%d)\n", b, c, d, e, g, f);
    }break;
case 4: {
        f = b*e;
        g = c*d;
        h = MaxGYS(g, f);
        f = f / h;
        g = g / h;
        printf("(%d/%d)/(%d/%d)=\t\t\t\t\t\t\t\t(%d/%d)\n", b, c, d, e, g, f);
    }
default:break;
    }
return;
}
int MaxGYS(int a, int b)//定义a,b中的最大值为整型变量
{
int c, t;
if (a<b)
    {
        t = a;
        a = b;
        b = t;
    }
while (b != 0)
    {
        c = a%b;
        a = b;
        b = c;
    }
return a;
}
void result()//分数四则随机题
{
int m, i;
for (i = 0; i<30; i++)
    {
        m = rand() % 2 + 1;
if (m == 1)
            Simple();
else
            real();
    }
    system("pause");
    system("cls");
    system("pause");
    system("cls");
return  ;

}

调试程序结果：

 

 

 

 

因为不会自己敲代码，以上代码为百度搜索得来。希望通过以后的学习，能够自己学会敲代码，并实现一个程序并运行。