Can a function return a string?

Can a function return a string?

Learn how to return a string from a C function The tricky thing is defining the return value type. Strings in C are arrays of char elements, so we can’t really return a string – we must return a pointer to the first element of the string. All forms are perfectly valid.

How do you return a string from a function?

Allocate memory on the heap using malloc or similar, then return that pointer. The caller will then need to call free when it is done with the memory. Allocate the string on the stack in the calling function (the one that will be using the string), and pass a pointer in to the function to put the string into.

Can you make a string function in C++?

To use string functions in C++ we need to add a library named in our code at the top, which gives you string functions. As we know there are many behaviors that string object understands and several operations we can perform on the string object.

How can I return multiple values in C++?

While C++ does not have an official way to return multiple values from a function, one can make use of the std::pair , std::tuple , or a local struct to return multiple values.

How do you return text in C++?

Return a String From a Function in C++

1. Use the std::string func() Notation to Return String From Function in C++
2. Use the std::string &func() Notation to Return String From Function.
3. Use the char *func() Notation to Return String From Function.

How do you return an array of strings in C++?

“function return string array c++” Code Answer

1. string* getNames() {
2. string* names = new string[3];
3. names[0] = “Simon”;
4. names[1] = “Peter”;
5. names[2] = “Dave”;
6. ​
7. return names;
8. }

How do I return a char in C++?

7 Answers

1. char* ch = new char; creates memory for ONE character, and assigns it to variable ch.
2. ch = “Hello Heap”; assigns to variable ch pointer to readonly memory, which contains bytes “Hello Heap\0” .
3. return ch; returns the pointer stored to variable ch .

How do you write a string with spaces in C++?

If you need to input a string with whitespace characters (or strings with blank spaces as you call it) until a newline character is encountered, set the delimiter to ‘\n’ character by using: scanf(” \%[^\n]s”,str);

How do you return a value in C++?

We can return more than one values from a function by using the method called “call by address”, or “call by reference”. In the invoker function we will use two variables to store the results, and the function will take pointer type data. So we have to pass the address of the data.

How does return work in C++?

The return statement returns the flow of the execution to the function from where it is called. This statement does not mandatorily need any conditional statements. As soon as the statement is executed, the flow of the program stops immediately and return the control from where it was called.

How to return a string value in C programming?

The tricky thing is defining the return value type. Strings in C are arrays of char elements, so we can’t really return a string – we must return a pointer to the first element of the string. This is why we need to use const char*: const char* myName() { return “Flavio”; }. Here’s an example working program:

How to modify a string literal in C?

Note that you can’t modify a string literal in C. Another thing to keep in mind is that you can’t return a string defined as a local variable from a C function, because the variable will be automatically destroyed (released) when the function finished execution, and as such it will not be available, if you for example try do do:

How to return a pointer to a char array in C++?

Thus, we can return a pointer to the first char element of that array by calling the built-in data () method. However, make sure you don’t to use a similar c_str () method when returning null-terminated character array of std::string object, as it replaces the const pointer to the first char element.

How many bytes does a string use in C?

This means that a string like “my string” actually uses 9+1 (=10!) bytes. This is important to know when you finally get around to allocating strings dynamically. So, without this ‘terminating zero’, you don’t have a string. You have an array of characters (also called a buffer) hanging around in memory.