Can C functions return pointers?

Can C functions return pointers?

Pointers in C programming language is a variable which is used to store the memory address of another variable. We can pass pointers to the function as well as return pointer from a function.

Can you return a structure from a function in C?

You can return a structure from a function (or use the = operator) without any problems. It’s a well-defined part of the language. You can pass structures to functions as well – a structure is exactly the same as any built-in type for purposes of parameter passing, return values, and assignment.

How are structure passing and returning implemented in C?

When structures are passed as arguments to functions, the entire structure is typically pushed on the stack, using as many words as are required. (Programmers often choose to use pointers to structures instead, precisely to avoid this overhead.

How do you return two pointers from a function?

3 Answers

1. Pass in an output argument as you have done, but do it correctly. You have to allocate space for an int * in main() and then pass the pointer to that to my_func .
2. Make your function allocate array of two pointers to the int arrays you are trying to allocate.
3. Return a structure or structure pointer.

How does swap work in C?

C Program to Swap two Numbers

1. Assign x to a temp variable : temp = x.
2. Assign y to x : x = y.
3. Assign temp to y : y = temp.

What can functions return in C?

A function in C can be called either with arguments or without arguments. These function may or may not return values to the calling functions. All C functions can be called either with arguments or without arguments in a C program. Also, they may or may not return any values.

What are the uses of C structures?

Uses of structures in C:

• C Structures can be used to store huge data.
• C Structures can be used to send data to the printer.
• C Structures can interact with keyboard and mouse to store the data.
• C Structures can be used in drawing and floppy formatting.
• C Structures can be used to clear output screen contents.

Are structs passed by reference C?

Passing struct by reference You can also pass structs by reference (in a similar way like you pass variables of built-in type by reference). We suggest you to read pass by reference tutorial before you proceed. During pass by reference, the memory addresses of struct variables are passed to the function.