C++ functions use type aliases to define return value types

Question: How to use type aliases to define function return value types in C? Answer: Use the using keyword to declare a type alias and name the original type as the new type alias. Use type aliases in function signatures to specify return value types. Using type aliases can shorten return value names and improve code readability and maintainability.

C function uses type alias to define the return value type

Using type alias can shorten the name of the function return type and make the code more clear Concise and easy to read.

Type alias syntax:

using 类型别名 = 原始类型;

Practical case:

Suppose there is a file called calculate_area() function, used to calculate the area of ​​a rectangle. The original function signature is as follows:

float calculate_area(float width, float height);

We can use type aliases to rename the float type to Area:

using Area = float;

Area calculate_area(float width, float height) {
  return width * height;
}

After renaming, the function The signature becomes:

Area calculate_area(float width, float height);

In this way, we can use the Area type alias throughout the code to represent the area of ​​the rectangle, improving the readability and maintainability of the code.

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