三维坐标点之间计算距离

#include "MainWindow.h" #include "ui_MainWindow.h" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , ui(new Ui::MainWindow) { ui->setupUi(this); } MainWindow::~MainWindow() { delete ui; } void MainWindow::on_CalcBtn_clicked() { double p1[3], p2[3]; p1[0] = ui->x1->text().toDouble(); p1[1] = ui->y1->text().toDouble(); p1[2] = ui->z1->text().toDouble(); p2[0] = ui->x2->text().toDouble(); p2[1] = ui->y2->text().toDouble(); p2[2] = ui->z2->text().toDouble(); double dis = Distance(p1, p2); ui->dis->setText(QString::number(dis, 'f',2)); } double MainWindow::Distance(double p1[3], double p2[3]) { double s = 0; for (int i = 0; i < 3; i++) { s = s + pow((p1[i] - p2[i]), 2); } double d = sqrt(s); return d; }