Leskhan Muratuly's questions

你好。有这样一个任务：

我不知道通过的行数。如何通过 C# 中的循环读取这些行？

大家好。需要你的帮助。我有一个将数字除以零的代码。但是程序无法捕捉到错误。如何决定？你能帮我吗？

public class Main {

    public static void main(String[] args) {
        try
        {
            int x = 0;
            int y = 5/x;
        }
        catch (Exception e)
        {
            System.out.println("erekshe zhagdai");
        }
        catch (ArithmeticException ae)
        {
            System.out.println("arithmetikalyk zhagdai");
        }
        System.out.println("ayaktaldy");
    } 
}

这是一个编译错误：

大家好。我想用

#pragma omp for

但是在编写代码时，我不断收到此错误。

由于这个错误，我的程序无法正常工作。如何解决这个问题呢？我在谷歌上找不到明确的答案。请帮帮我。完整代码如下：

#include <iostream>
#include <omp.h>
#include <iomanip>

#define N 1000000

int main()
{
    setlocale(LC_ALL, "Russian");

    long long number;
    std::cout << "Введите число: ";
    std::cin >> number;

    long double count = 0;
    while (number > 0)
    {
        number /= 10;
        count++;
    }

    long double numberPi = 0;
    long double temp;

#pragma omp parallel num_threads(8)
    {
#pragma omp for
        for (long long i = 0; i < N; i++)
        {
            temp = (i + 0.5) * (1.0 / N);
            numberPi += 4.0 / (1.0 + temp * temp);
        }
    }
    std::cout.precision(count - 1);
    std::cout << "number Pi: " << numberPi * (1.0 / (N)) << std::endl;
    std::cout << "count: " << count << std::endl;
    
    return 0;
}

public abstract class Number {
    private double number;

    public Number(double number) {
        this.number = number;
    }

    public double getNumber() {
        return number;
    }

    public abstract void display();

    public abstract void plusNumbers();

    public abstract void minusNumbers();

    public abstract void mulNumbers();

    public abstract void divNumbers();

    
    public class Integer extends Number {
        private int integerNumber;

        public Integer(double number, int integerNumber) {
            super(number);
            this.integerNumber = integerNumber;
        }

        public int getIntegerNumber() {
            return integerNumber;
        }

        public void setIntegerNumber(int integerNumber) {
            this.integerNumber = integerNumber;
        }

        public void display() {
            System.out.printf("Number: %s", super.getNumber());
        }

        public void plusNumbers() {
            System.out.printf("%s + %s = %s", super.getNumber(), integerNumber,
                    super.getNumber() + (double) integerNumber);
        }

        public void minusNumbers() {
            System.out.printf("%s - %s = %s", super.getNumber(), integerNumber,
                    super.getNumber() - (double) integerNumber);
        }

        public void mulNumbers() {
            System.out.printf("%s * %s = %s", super.getNumber(), integerNumber,
                    super.getNumber() * (double) integerNumber);
        }

        public void divNumbers() {
            System.out.printf("%s / %s = %s", super.getNumber(), integerNumber,
                    super.getNumber() / (double) integerNumber);
        }
    }

    public class Real extends Number {
        private double realNumber;

        public Real(double number, double realNumber) {
            super(number);
            this.realNumber = realNumber;
        }

        public double getRealNumber() {
            return realNumber;
        }

        public void setRealNumber(double realNumber) {
            this.realNumber = realNumber;
        }

        public void display() {
            System.out.printf("Number: %s", super.getNumber());
        }

        public void plusNumbers() {
            System.out.printf("%s + %s = %s", super.getNumber(), realNumber, super.getNumber() + realNumber);
        }

        public void minusNumbers() {
            System.out.printf("%s - %s = %s", super.getNumber(), realNumber, super.getNumber() - realNumber);
        }

        public void mulNumbers() {
            System.out.printf("%s * %s = %s", super.getNumber(), realNumber, super.getNumber() * realNumber);
        }

        public void divNumbers() {
            System.out.printf("%s / %s = %s", super.getNumber(), realNumber, super.getNumber() / realNumber);
        }
    }

    public static void Main(String[] args) {
        Real realNum = new Real(4.0, 4.1);

        realNum.plusNumbers();
    }

}

启动程序时，报错：

我看了例子。在谷歌上寻找错误。但我能够找到。请帮帮我。

我开始学习JavaScript。而且我没有足够的练习。请推荐任何有练习的网站或书籍。理想的主题是主题。

css中如何使用border-radius写入4个值？