Практикум по программированию. Основы. Ветвление. Корни уравнения

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Contents

Java

import java.util.Scanner;
import java.lang.Math;

public class Task01 {

    public static void main(String[] args) {

        Scanner in = new Scanner(System.in);

        System.out.println();
        System.out.println(" Поиск корней уравнения A * X^2 + B * X + C = 0");
        System.out.println("------------------------------------------------");

        System.out.print(" Введите A: ");
        double a = in.nextDouble();

        System.out.print(" Введите B: ");
        double b = in.nextDouble();

        System.out.print(" Введите C: ");
        double c = in.nextDouble();

        System.out.println("------------------------------------------------");

        double d = b * b - 4 * a * c;
        double x1, x2;

        if (d > 0) {

            x1 = (-b + Math.sqrt(d)) / (2 * a);
            x2 = (-b - Math.sqrt(d)) / (2 * a);

            System.out.printf(" X1 = %.3f\n", x1);
            System.out.printf(" X2 = %.3f\n", x2);

        } else if (d == 0) {

            x1 = -b / (2 * a);

            System.out.printf(" X = %.3f\n", x1);

        } else {

            System.out.println(" Уравнение корней не имеет");

        }
    }
}


C++

// g++ 4.2

#include <iostream>
#include <math.h>

using namespace std;

int main() {
    
    double a, b, c;
    
    cout << "\n Поиск корней уравнения A * X^2 + B * X + C = 0\n";
    cout << "------------------------------------------------\n";
    
    cout << " Введите A: ";
    cin >> a;
    
    cout << " Введите B: ";
    cin >> b;
    
    cout << " Введите C: ";
    cin >> c;
    
    cout << "------------------------------------------------\n";
    
    double d = b * b - 4 * a * c;
    double x1, x2;
    
    if (d > 0) {

        x1 = (-b + sqrt(d)) / (2 * a);
        x2 = (-b - sqrt(d)) / (2 * a);
        
        printf(" X1 = %.3f\n", x1);
        printf(" X2 = %.3f\n", x2);
        
    } else if (d == 0) {
            
        x1 = -b / (2 * a);
            
        printf(" X = %.3f\n", x1);
            
    } else {
            
        cout << " Уравнение корней не имеет\n";
            
    }
    
    cout << "\n";
    return 0;
}


Pascal




Задачи · Дальше

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