main.cpp

来自「C++ Source code from a tutorial」· C++ 代码 · 共 61 行

#include <iostream>
#include <stdlib.h>

using namespace std;

struct Point3D {
    double x;
    double y;
    double z;
};

bool operator == (Point3D &first, Point3D &second) {
    return (
        first.x == second.x &&
        first.y == second.y &&
        first.z == second.z);
}

bool ComparePoint3D(Point3D &first, Point3D &second) {
    return (
        first.x == second.x &&
        first.y == second.y &&
        first.z == second.z);
}

Point3D StartingPoint(float x) {
    Point3D start;
    start.x = x;
    start.y = x * 2;
    start.z = x * 3;
    return start;
}

int main(int argc, char *argv[])
{
    Point3D FirstPoint = { 10.5, 22.25, 30.8 };
    Point3D SecondPoint = FirstPoint;
    Point3D ThirdPoint = { 25.99, 15.2, 30.9 };

    if (ComparePoint3D(FirstPoint,SecondPoint)) {
        cout << "First and second are the same" << endl;
    }
    if (ComparePoint3D(FirstPoint, ThirdPoint)) {
        cout << "First and third are the same" << endl;
    }
    
    Point3D MyPoint = StartingPoint(5.2);
    Point3D OtherPoint = StartingPoint(6.5);
    
    cout << MyPoint.x << endl;
    cout << MyPoint.y << endl;
    cout << MyPoint.z << endl;
    cout << endl;
    cout << OtherPoint.x << endl;
    cout << OtherPoint.y << endl;
    cout << OtherPoint.z << endl;

    system("PAUSE");   
    return 0;
}