ТиТП1

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Задача на расчет расстояния м/у 2 точками в X, Y, Z

#include <cmath>
#include <iostream>
#include <iomanip>
using std::cout;
using std::cin;
using std::endl;
int main()
{
    cout << "Please enter A (x1,y1,z1) = " << endl;
    double x1{};
    cin >> x1;
    double y1{};
    cin >> y1;
    double z1{};
    cin >> z1;
    cout << "Please enter B (x2,y2,z2) = " << endl;
    double x2{};
    cin >> x2;
    double y2{};
    cin >> y2;
    double z2{};
    cin >> z2;
    double R;
    R = sqrt(pow((x2 - x1), 2) + pow((y2 - y1), 2) + pow((z2 - z1), 2));
    cout << std::setprecision(10) << "The distance between A (x1,y1,z1) and B (x2,y2,z2) = " << R << endl;
    return 0;
}

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Задача на на нахождение P и S произвольного треугольника

#include <cmath>
#include <iostream>
#include <iomanip>
using std::cout;
using std::cin;
using std::endl;
int main()
{
    cout << "Please enter A (x1,y1) = " << endl;
    double x1{};
    cin >> x1;
    double y1{};
    cin >> y1;
    cout << "Please enter B (x2,y2) = " << endl;
    double x2{};
    cin >> x2;
    double y2{};
    cin >> y2;
    cout << "Please enter C (x3,y3) = " << endl;
    double x3{};
    cin >> x3;
    double y3{};
    cin >> y3;
    double N;
    N = sqrt(pow((x2 - x1), 2) + pow((y2 - y1), 2));
    double M;
    M = sqrt(pow((x3 - x2), 2) + pow((y3 - y2), 2));
    double K;
    K = sqrt(pow((x3 - x1), 2) + pow((y3 - y1), 2));
    double P;
    P = N + M + K;
    double L;
    L = P*0.5;
    double S;
    S = sqrt(L*(L - N)*(L - M)*(L - K));
    cout << std::setprecision(10) << "AB = " << N << endl;
    cout << std::setprecision(10) << "BC = " << M << endl;
    cout << std::setprecision(10) << "AC = " << K << endl;
    cout << std::setprecision(10) << "P = " << P << endl;
    cout << std::setprecision(10) << "S = " << S << endl;
    return 0;
}

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Задача на нахождение суммы четырехзначного числа

#include <cmath>
#include <iostream>
using std::cout;
using std::cin;
using std::endl;
int main()
{
    cout << "Please enter number = " << endl;
    int N, x1, x2, x3, x4 {};
    cin >> N;
    x4 = N % 10;
    x3 = N / 10 % 10;
    x2 = N / 100 % 10;
    x1 = N / 1000;
    int S;
    S = x1 + x2 + x3 + x4;
    cout << "S = " << S << endl;
    return 0;
}

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Задача на нахождение суммы трехзначного числа:

#include <cmath>
#include <iostream>
using std::cout;
using std::cin;
using std::endl;
int main()
{
    cout << "Please enter number = " << endl;
    int N, x1, x2, x3 {};
    cin >> N;
    x3 = N % 10;
    x2 = N / 10 % 10;
    x1 = N / 100;
    int S;
    S = x1 + x2 + x3;
    cout << "S = " << S << endl;
    return 0;
}

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