Defining C++ function return value types using type modifiers

C The function return value type is specified using type modifiers, where: void means no return value; int, float, double, etc. mean returning basic data types; reference type (&) means returning a reference to data; pointer type (* ) means return a pointer to the data.

Use type modifiers to define C function return value types

In C, the function return value type is the one in the function definition An important part of. It tells the compiler what type of data the function will return and helps ensure that the function works as expected. Use type modifiers to specify function return value types.

Type modifier

void: indicates that the function has no return value.

int, float, double: indicates that the function will return the corresponding basic data type.

Reference type (&): Indicates that the function will return a reference to the data.

Pointer type (*): Indicates that the function will return a pointer to the data.

Practical case

The following is an example of a function that returns an integer:

int get_age() {
  // ...
}

The following is an example of a function that returns a reference to a string:

std::string& get_name() {
  // ...
}

The following is an example of a function that returns a pointer to an array:

int* get_array() {
  // ...
}

Note:

• If the function does not return a value, it must Use void as the return value type.
• Reference types should be used with caution as they carry the risk of dangling references.
• Pointer types are usually used for dynamic memory allocation.

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