运算符作业

Love The Way You Lie 2022-06-17 13:14 118阅读 0赞

作业描述：  
![这里写图片描述][SouthEast]

参考代码：

#include <stdio.h>
    
    int GetAbsoluteValue(int num)//求绝对值
    {
        return num > 0 ? num : -num;
    }
    
    double GetAbsoluteValue2(double num)
    {
        return num > 0 ? num : -num;
    }
    
    double GetSqrt(double num)
    {
        //此题进行一下扩展，原题是输入正整数，为了更加通用，改成输入一个正数
        const double eps = 1e-12;//定义结果的精度
        double x = 0, y = num / 2;
        while (GetAbsoluteValue2(y - x) >= eps)
        {
            x = y;
            y = (x + num / x) / 2;
        }
        return x;
    }
    
    void CalculateQuotientAndReminder(int dividend, int divisor)
    {
        //思路：先判断符号是否同号，然后比较绝对值，然后不停的减去除数
        int quotient = 0;
        int remainder = 0;
        if (0 == divisor)
        {
            printf("除数不能为0\n");
            return;
        }
        if (dividend * divisor < 0) //表示异号
        {
            while (GetAbsoluteValue(dividend) >= GetAbsoluteValue(divisor))
            {
                dividend += divisor;
                quotient--;
            }
        }
        else
        {
            while (GetAbsoluteValue(dividend) >= GetAbsoluteValue(divisor))
            {
                dividend -= divisor;
                quotient++;
            }
        }
    
        remainder = dividend;
        printf("商=%d\n", quotient);
        printf("余数=%d\n", remainder);
    }
    
    int main()
    {
        double Radius;
        const double Pi = 3.1415926;
        int dividend;
        int divisor;
        double sqrtnum;
    
        printf("-----------------------------------必做作业1：----------------------------------\n");
        printf("-7%%2=%d\n", (-7) % 2);
        printf("7%%-2=%d\n", 7 % (-2));
    
        printf("\n");
        printf("-----------------------------------必做作业2：----------------------------------\n");
        printf("输入圆的半径: ");
        scanf_s("%lf", &Radius);
        printf("圆的面积=%.6lf\n", Pi * Radius * Radius);
    
        printf("\n");
        printf("-----------------------------------选做作业1：----------------------------------\n");
        printf("输入被除数: ");
        scanf_s("%d", &dividend);
        printf("输入被除数: ");
        scanf_s("%d", &divisor);
        CalculateQuotientAndReminder(dividend, divisor);
    
        printf("\n");
        printf("-----------------------------------选做作业2：----------------------------------\n");
        printf("输入被开平方根的数: ");
        scanf_s("%lf", &sqrtnum);
        printf("开根结果=%.10lf\n", GetSqrt(sqrtnum));
    
        return 0;
    }

输出结果：  
![这里写图片描述][SouthEast 1]

[SouthEast]: /images/20220617/bdc52c7ff4614d88a1e68f28057daa6d.png
[SouthEast 1]: /images/20220617/5da944ea020c4de39a05f518f984579e.png