Binary Operators 重载
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小牛编辑
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2023-12-01
下表显示了二元运算符列表及其用途。
功能名称 | 操作者 | 目的 |
---|---|---|
opBinary | + | Add |
opBinary | - | subtract |
opBinary | * | multiply |
opBinary | / | divide |
opBinary | % | 余下的 |
opBinary | ^^ | to the power of |
opBinary | & | 按位和 |
opBinary | | | 按位或 |
opBinary | ^ | 按位xor |
opBinary | << | left-shift |
opBinary | >> | right-shift |
opBinary | >>> | logical right-shift |
opBinary | ~ | concatenate |
opBinary | in | whether contained in |
下面显示了一个示例,它解释了如何重载二元运算符。
例子 (Example)
import std.stdio;
class Box {
public:
double getVolume() {
return length * breadth * height;
}
void setLength( double len ) {
length = len;
}
void setBreadth( double bre ) {
breadth = bre;
}
void setHeight( double hei ) {
height = hei;
}
Box opBinary(string op)(Box b) {
if(op == "+") {
Box box = new Box();
box.length = this.length + b.length;
box.breadth = this.breadth + b.breadth;
box.height = this.height + b.height;
return box;
}
}
private:
double length; // Length of a box
double breadth; // Breadth of a box
double height; // Height of a box
};
// Main function for the program
void main( ) {
Box box1 = new Box(); // Declare Box1 of type Box
Box box2 = new Box(); // Declare Box2 of type Box
Box box3 = new Box(); // Declare Box3 of type Box
double volume = 0.0; // Store the volume of a box here
// box 1 specification
box1.setLength(6.0);
box1.setBreadth(7.0);
box1.setHeight(5.0);
// box 2 specification
box2.setLength(12.0);
box2.setBreadth(13.0);
box2.setHeight(10.0);
// volume of box 1
volume = box1.getVolume();
writeln("Volume of Box1 : ", volume);
// volume of box 2
volume = box2.getVolume();
writeln("Volume of Box2 : ", volume);
// Add two object as follows:
box3 = box1 + box2;
// volume of box 3
volume = box3.getVolume();
writeln("Volume of Box3 : ", volume);
}
编译并执行上述代码时,会产生以下结果 -
Volume of Box1 : 210
Volume of Box2 : 1560
Volume of Box3 : 5400