Pointer to Function | Data Structure Using C

TL;DR

Learn how to declare and use pointers to functions in C, allowing you to store and call functions using pointers.

Transcript

hello dear students i am samir velankar i welcome all of you to this another video on pointers in c in this video we will be seeing a very interesting topic called pointer to a function let's see now you all know every variable is stored in the memory and every variable has some address just as every variable has an address our program also has an ... Read More

Key Insights

• ❓ Every variable and function in a program has a memory address.
• ♿ Functions can be accessed by their address using the function name without parentheses.
• 👂 Pointers to functions are declared by specifying the return type, parameter list, and the name of the pointer within brackets.
• 👻 Function pointers provide flexibility in program execution by allowing you to store and call functions using pointers.
• 🤙 Function pointers can be used to avoid repetitive code and enable dynamic function calls.
• 👻 The name of a function itself acts as its address, allowing it to be stored in and accessed through function pointers.
• ❓ Function pointers can be used to implement callback functions and function callbacks.

Questions & Answers

Q: How do you find the address of a function in C?

To find the address of a function in C, simply write the name of the function without parentheses. This will give you the memory address of the function.

Q: How do you declare a pointer to a function in C?

To declare a pointer to a function in C, specify the return type, parameter list, and the name of the pointer within brackets. For example, int (*p)(int) declares a pointer to a function that takes an integer parameter and returns an integer.

Q: How do you store the address of a function in a function pointer?

To store the address of a function in a function pointer, simply assign the function name to the pointer. For example, p = f1; will store the address of the function f1 in the pointer p.

Q: How do you call a function using a function pointer in C?

To call a function using a function pointer in C, use the pointer name followed by the parameter list. For example, p(2) will call the function pointed to by p with the parameter value of 2.

Summary & Key Takeaways

• Every variable and function in a program has a memory address.

• Functions can be accessed by their address using the function name without parentheses.

• You can declare a pointer to a function by specifying the return type, parameter list, and the name of the pointer within brackets.

• Pointers to functions allow you to store and call functions using pointers, providing flexibility in program execution.