- Data Structure
- Networking
- RDBMS
- Operating System
- Java
- MS Excel
- iOS
- HTML
- CSS
- Android
- Python
- C Programming
- C++
- C#
- MongoDB
- MySQL
- Javascript
- PHP
- Physics
- Chemistry
- Biology
- Mathematics
- English
- Economics
- Psychology
- Social Studies
- Fashion Studies
- Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How to declare a pointer to a function in C?
A pointer is a variable whose value is the address of another variable or memory block, i.e., direct address of the memory location. Like any variable or constant, you must declare a pointer before using it to store any variable or block address.
Syntax
Datatype *variable_name
Algorithm
Begin. Define a function show. Declare a variable x of the integer datatype. Print the value of varisble x. Declare a pointer p of the integer datatype. Define p as the pointer to the address of show() function. Initialize value to p pointer. End.
This is a simple example in C to understand the concept a pointer to a function.
#include void show(int x) { printf("Value of x is %d\n", x); } int main() { void (*p)(int); // declaring a pointer p = &show; // p is the pointer to the show() (*p)(7); //initializing values. return 0; }
Output
Value of x is 7.
Advertisements