一個(gè)指向類是做完全相同的方式作為一個(gè)指向結(jié)構(gòu)和存取指針的成員使用成員訪問運(yùn)算符類- >操作符，就像結(jié)構(gòu)體指針。與其它的指針一樣，必須在使用前初始化指針。
讓我們?cè)囋囅旅娴睦泳兔靼琢酥羔樦赶蛞粋€(gè)類的概念：
import std.stdio; class Box { public: // Constructor definition this(double l=2.0, double b=2.0, double h=2.0) { writeln("Constructor called."); length = l; breadth = b; height = h; } double Volume() { return length * breadth * height; } private: double length; // Length of a box double breadth; // Breadth of a box double height; // Height of a box } void main() { Box Box1 = new Box(3.3, 1.2, 1.5); // Declare box1 Box Box2 = new Box(8.5, 6.0, 2.0); // Declare box2 Box *ptrBox; // Declare yiibaier to a class. // Save the address of first object ptrBox = &Box1; // Now try to access a member using member access operator writeln("Volume of Box1: ",ptrBox.Volume()); // Save the address of first object ptrBox = &Box2; // Now try to access a member using member access operator writeln("Volume of Box2: ", ptrBox.Volume()); }
讓我們編譯和運(yùn)行上面的程序，這將產(chǎn)生以下結(jié)果：
Constructor called. Constructor called. Volume of Box1: 5.94 Volume of Box2: 102
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