Function pointer in c

Pointer in c

#include <stdio.h>

int main()
{
    int j;
    int i;
    int *p; // declare pointer

    i = 7;
    p = &i; // The pointer now holds the address of i
    j = *p;

    printf("i = %d \n", i);  // value of i
    printf("j = %d \n", j);  // value of j
    printf("*p = %d \n", p); // the address held by the pointer

    *p = 32; // asigns value to i via the pointer

    printf("i = %d \n", i);   // value of i
    printf("j = %d \n", j);   // value of j
    printf("*p = %d \n", p);  // the address held by the pointer
    printf("&i = %d \n", &i); // address of i
  
  	return 0;
    }

Function pointer in c

// Basic syntax
ret_type (*fun_ptr)(arg_type1, arg_type2,..., arg_typen);

// Example
void fun(int a)
{
    printf("Value of a is %d\n", a);
}

// fun_ptr is a pointer to function fun() 
void (*fun_ptr)(int) = &fun;

Pointer in C

#include <stdio.h>
int main()
{
   int* pc, c;
   
   c = 22;
   printf("Address of c: %p\n", &c);
   printf("Value of c: %d\n\n", c);  // 22
   
   pc = &c;
   printf("Address of pointer pc: %p\n", pc);
   printf("Content of pointer pc: %d\n\n", *pc); // 22
   
   c = 11;
   printf("Address of pointer pc: %p\n", pc);
   printf("Content of pointer pc: %d\n\n", *pc); // 11
   
   *pc = 2;
   printf("Address of c: %p\n", &c);
   printf("Value of c: %d\n\n", c); // 2
   return 0;
}

Similar codes

0 vote306 views1 answer
C execute shell command
C
-1 vote287 views1 answer
Robtex
C
0 vote293 views1 answer
Passing an array to a function
C
0 vote302 views7 answers
Convert c to python online
C
0 vote273 views1 answer
Linked list by address c
C
0 vote308 views1 answer
How to do Employing defensive code in the UI to ensure that the current frame is the most top level window
C
0 vote248 views2 answers
Deepak
C
0 vote314 views1 answer
Geom boxplot remove outliers
C
54 votes398 views3 answers
Express post
C
0 vote335 views1 answer
Write a 64-bit program in assembly that prints Hello, world in .asm
C