ringa_lee2017-04-17 11:10:32
Definition of function overloading: Function overloading means that in the same scope, there can be a group of functions with the same function name and different parameter lists. This group of functions is called an overloaded function. ,
So the principle is the same function name, different parameter list. The return value cannot be used as the basis for overloading.
阿神2017-04-17 11:10:32
In C class inheritance, the subclass will inherit the functions of the parent class. When you declare an object with the subclass, call a method in the object. It happens that this method is inherited from the parent class, then Call this method directly from the parent class. However, if you define a method with the same name in a subclass, the method will be called from the subclass, not the parent class. And the parent class's methods will be completely ignored. This is the principle of function overloading.
伊谢尔伦2017-04-17 11:10:32
This is an example of function overloading.
#include <iostream>
// volume of a cube
int volume(int s)
{
return s*s*s;
}
// volume of a cylinder
double volume(double r, int h)
{
return 3.14*r*r*static_cast<double>(h);
}
// volume of a cuboid
long volume(long l, int b, int h)
{
return l*b*h;
}
int main()
{
std::cout << volume(10);
std::cout << volume(2.5, 8);
std::cout << volume(100, 75, 15);
}
怪我咯2017-04-17 11:10:32
The principle of function overloading is that the functions of two functions are very similar, with only a few differences (such as parameter types). If the functions implemented by two functions are quite different, they should be given different names.
高洛峰2017-04-17 11:10:32