Home > Backend Development > C++ > body text

What is the role of function name in C++ function overloading?

PHPz
Release: 2024-04-13 14:39:01
Original
499 people have browsed it

In C, the function name plays a role in distinguishing overloaded functions. Each overloaded function has a unique function signature (including function name and parameter list), and the compiler determines which function to call based on the signature.

C++ 函数重载中函数名的作用是什么?

The role of function names in C function overloading

In C, function overloading allows you to create new files with the same name But multiple functions with different parameter lists. The function name is used to distinguish these functions among overloaded functions.

Principle

Each overloaded function has a unique function signature, which consists of the function name and parameter list. The compiler uses function signatures to determine which function is called in a specific call.

Syntax

The syntax of overloaded functions is as follows:

returnType functionName(parameterList) {
  // 函数体
}
Copy after login

Among them:

  • returnType is the return type of the function.
  • functionName is the name of the function.
  • parameterList is the parameter list of the function, including parameter types and names.

Practical case

Consider the following overloaded functions for calculating area:

// 计算面积的重载函数
double area(int width, int height);
double area(double radius);
Copy after login

The first function calculates the area of ​​a rectangle, The second function calculates the area of ​​the circle. Although the two functions have the same name, they have different parameter lists. The compiler will determine which function to call based on the arguments provided when calling.

Usage Example

The following code uses these two overloaded functions to calculate the area of ​​a rectangle and the area of ​​a circle:

int main() {
  int width = 10;
  int height = 20;
  double radius = 5.0;

  // 计算矩形的面积
  double rectArea = area(width, height);

  // 计算圆的面积
  double circleArea = area(radius);

  // 打印结果
  std::cout << "矩形面积:" << rectArea << std::endl;
  std::cout << "圆形面积:" << circleArea << std::endl;

  return 0;
}
Copy after login

Output

矩形面积:200
圆形面积:78.5398
Copy after login

The above is the detailed content of What is the role of function name in C++ function overloading?. For more information, please follow other related articles on the PHP Chinese website!

source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template