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 vote249 views1 answer
Gtk widget change window title
C
0 vote239 views1 answer
Quick sort in c
C
0 vote264 views4 answers
Coin row problem calculator
C
0 vote269 views1 answer
List fiter octobercms
C
0 vote271 views1 answer
C read a whole string from a file
C
18 votes285 views2 answers
C concatenate and allocate string
C
0 vote259 views1 answer
Oracle trunc
C
1 vote263 views1 answer
Two bytes to int c
C
1 vote262 views1 answer
C printf to string
C
2 votes261 views1 answer
Mirzapur 2
C