How to Create a Typedef for a Function Pointer in C?
In C, a function pointer is a variable that stores the address of a function that can later be called through that function pointer. The typedef is a keyword used to create an alias or alternative name for the existing data types. In this article, we will learn how to create a typedef for a function pointer in C.
Typedef for a Function Pointer in C
To create a typedef for a function pointer, we specify the return type of the function, followed by an asterisk (*) and the name of the typedef in parentheses. We also need to specify the number and types of parameters of the function pointer.
Syntax
typedef return_type (*alias_name)(parameter_types and numbers....);
Here, return_type is the return type of the function alias-name is the alias we want to give to the function pointer type and parameter_types are the types of the parameters the function takes.
C Program to Create a Typedef for a Function Pointer in C
C
// C Program for how to create a Typedef for a Function // Pointer #include <stdio.h> typedef int (*Operation)( int , int ); int add( int a, int b) { return a + b; } // Function to the subtract two integers int subtracts( int a, int b) { return a - b; } // Driver Code int main() { // Declare function pointers using typedef Operation operationAdd = add; Operation operationSubtract = subtracts; printf ( "Addition result: %d\n" , operationAdd(20, 9)); printf ( "Subtraction result: %d\n" , operationSubtract(20, 9)); return 0; } |
Addition result: 29 Subtraction result: 11
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