Can C++ functions be overloaded? How to reload?

Function overloading allows the creation of multiple functions with the same name but different parameter lists in a class or structure, providing specific behaviors for different parameter combinations. The syntax is as follows: define the return type, function name and first parameter list. Define the return type, function name, and second parameter list. You can continue to define more overloaded functions with different parameter lists.

C Function Overloading: Definition, Syntax and Practice

Definition

Function overloading allows the creation of multiple functions with the same name but different signatures (different parameter lists) in a class or structure. Each overloaded function will provide specific behavior for different combinations of arguments.

Syntax

The syntax of function overloading is as follows:

return_type function_name(parameter_list_1);
return_type function_name(parameter_list_2);
...
return_type function_name(parameter_list_n);

Among them:

• return_type is the return type of the function.
• function_name is the name of the function.
• parameter_list_i is the parameter list of the i-th overloaded function.

Practical case

Consider the following example:

#include <iostream>

using namespace std;

// 计算圆的面积
double area(double radius) {
    return 3.14 * radius * radius;
}

// 计算矩形的面积
double area(double length, double width) {
    return length * width;
}

int main() {
    cout << "圆的面积： " << area(5) << endl;
    cout << "矩形的面积： " << area(5, 10) << endl;

    return 0;
}

In this example, we define two area Function overloading:

1. area(double radius): Calculate the area of ​​a circle, accepting a double parameter (radius).
2. area(double length, double width): Calculate the area of ​​the rectangle, accepting two double parameters (length and width).

main function calls these two overloaded functions. Because the number and types of arguments differ, the compiler can tell which area function overload should be called.

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