Примери за извикване на конструктори на член-данни обекти

triffon · Mar 30, 2022 · ffb3cb7 · ffb3cb7
1 parent fd814d7
commit ffb3cb7
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Showing 5 changed files with 23 additions and 4 deletions.
diff --git a/lectures/1/geometry/main.cpp b/lectures/1/geometry/main.cpp
@@ -17,7 +17,8 @@ void testGeometry() {
 void testGeometry3D() {
     Point3D p(1, 3, 8);
     p.printnl();
-    Point3D q;
+    Point3D q = p;
+    q.printnl();
     q.read();
     p.translate(q);
     std::cout << p.distanceToOrigin() << std::endl;

diff --git a/lectures/1/geometry/point2d.cpp b/lectures/1/geometry/point2d.cpp
@@ -3,15 +3,21 @@
 #include "point2d.hpp"
 
 Point2D::Point2D() {
+    std::clog << "Point2D::Point2D()\n";
     setX(0);
     setY(0);
 }
 
 Point2D::Point2D(double _x, double _y) {
+    std::clog << "Point2D::Point2D(...)\n";
     setX(_x);
     setY(_y);
 }
 
+Point2D::Point2D(Point2D const& other) : x(other.x), y(other.y) {
+    std::clog << "Point2D::Point2D(Point2D const&)\n";
+}
+
 // селектор за разстояние до центъра на координатната система
 double Point2D::distanceToOrigin() const {
     //return distanceTo(Point2D());

diff --git a/lectures/1/geometry/point2d.hpp b/lectures/1/geometry/point2d.hpp
@@ -8,6 +8,7 @@ class Point2D {
     // конструктори
     Point2D();
     Point2D(double _x, double _y);
+    Point2D(Point2D const&);
 
     // селектори за координатите
     double getX() const { return x; }

diff --git a/lectures/1/geometry/point3d.cpp b/lectures/1/geometry/point3d.cpp
@@ -2,15 +2,25 @@
 #include "point3d.hpp"
 
 Point3D::Point3D() {
+    std::clog << "Point3D::Point3D()\n";
     setP(Point2D());
     setZ(0);
 }
 
-Point3D::Point3D(double _x, double _y, double _z) {
-    setP(Point2D(_x, _y));
+Point3D::Point3D(double _x, double _y, double _z) : p(_x, _y) {
+    std::clog << "Point3D::Point3D(...)\n";
+    getP().printnl();
+ //   setP(Point2D(_x, _y));
     setZ(_z);
 }
 
+/*
+Point3D::Point3D(Point3D const& other) : p(other.p), z(other.z) {
+    // setP(other.getP());
+    //setZ(other.getZ());
+}
+*/
+
 Point3D::Point3D(Point2D const& _p, double _z) {
     setP(_p);
     setZ(_z);

diff --git a/lectures/1/geometry/point3d.hpp b/lectures/1/geometry/point3d.hpp
@@ -13,9 +13,10 @@ class Point3D {
     Point3D();
     Point3D(Point2D const& _p, double _z);
     Point3D(double _x, double _y, double _z);
+//    Point3D(Point3D const&);
 
     // селектори
-    Point2D getP() const { return p; }
+    Point2D const& getP() const { return p; }
     double  getX() const { return p.getX(); }
     double  getY() const { return p.getY(); }
     double  getZ() const { return z; }