pointers in C(pointers)

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Lazy Lion answered on May 2, 2021 Popularity 9/10 Helpfulness 1/10

answer pointers in C(pointers)

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pointers in C(pointers)

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#include <stdio.h>

int main () {

   int  var = 20;   /* actual variable declaration */
   int  *ip;        /* pointer variable declaration */

   ip = &var;  /* store address of var in pointer variable*/

   printf("Address of var variable: %x\n", &var  );

   /* address stored in pointer variable */
   printf("Address stored in ip variable: %x\n", ip );

   /* access the value using the pointer */
   printf("Value of *ip variable: %d\n", *ip );

   return 0;
}

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Source: www.tutorialspoint.com

Tags: pointers whatever

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Contributed on Apr 22 2023

Lazy Lion

0 Answers Avg Quality 2/10

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c pointers

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#include<stdio.h>

/*
	'*' is the dereference operator; it will grab the value at a memory address.
    	it is also used to declare a pointer variable.
    
    '&' is the address-of operator; it will grab the memory address of a variable.
*/

int main(int argc, char *argv[]) {
	int x = 45;			// Declare integer x to be 45.
    int *int_ptr = &x;	// int_ptr now points to the value of x.  Any changes made to the value at int_ptr will also modify x.
  	
  	x = 5;				// Now, the value of x is 5.  This means that the value at int_ptr is now 5.
  	*int_ptr = 2;		// Now, the value at int_ptr is 2.  This means that x is now 0.
  	int_ptr = NULL;		// int_ptr now no longer points to anything.  Make sure you never leave a dangling pointer!
    
    return 0;
}

Popularity 10/10 Helpfulness 3/10 Language c

Source: Grepper

Tags: c

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Contributed on Jun 22 2021

kadealicious

0 Answers Avg Quality 2/10

pointer in c

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#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;
    }

Popularity 10/10 Helpfulness 3/10 Language c

Source: Grepper

Tags: c

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Contributed on Feb 13 2022

Dirty Moose

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pointers to a function in c

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#include <stdio.h>
#include <string.h>

void (*StartSd)(); // function pointer
void (*StopSd)();  // function pointer

void space()
{
    printf("\n");
}

void StopSound() // funtion
{
    printf("\nSound has Stopped");
}

void StartSound() // function
{
    printf("\nSound has Started");
}

void main()
{

    StartSd = StartSound; // Assign pointer to function
    StopSd = StopSound;   // Assign pointer to function

    (*StartSd)(); // Call the function with the pointer
    (*StopSd)();  // Call the Function with the pointer

    space();

    StartSd(); // Call the function with the pointer
    StopSd();  // Call the function with the pointer

    space();

    StartSound(); // Calling the function by name.
    StopSound();  // Calling the function by name.
}

Popularity 10/10 Helpfulness 3/10 Language c

Source: Grepper

Tags: c

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Contributed on Mar 21 2022

Dirty Moose

0 Answers Avg Quality 2/10

how to make pointers in c

Comment

datatype *var;

variable var actually holds the address of the data(memory where it is stored)
*var lets you access the data stored at that address

Popularity 10/10 Helpfulness 2/10 Language whatever

Source: Grepper

Tags: c

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Contributed on May 02 2021

Weary Wildebeest

0 Answers Avg Quality 2/10

pointer in C

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#include<stdio.h>
#include<stdlib.h>
main()
{
    int *p;
    p=(int*)calloc(3*sizeof(int));
    printf("Enter first number\n");
    scanf("%d",p);
    printf("Enter second number\n");
    scanf("%d",p+2);
    printf("%d%d",*p,*(p+2));
    free(p);
}

Popularity 10/10 Helpfulness 1/10 Language c

Source: www.sanfoundry.com

Tags: c

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Contributed on May 28 2022

Busy Bat

0 Answers Avg Quality 2/10

pointer in C

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#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;
}

Popularity 10/10 Helpfulness 1/10 Language c

Source: Grepper

Tags: c

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Contributed on Jan 18 2022

Precious Pollan

0 Answers Avg Quality 2/10

pointers c

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#include <stdio.h>
int main()
{
   int *p;
   int var = 10;

   p= &var;

   printf("Value of variable var is: %d", var);
   printf("\nValue of variable var is: %d", *p);
   printf("\nAddress of variable var is: %p", &var);
   printf("\nAddress of variable var is: %p", p);
   printf("\nAddress of pointer p is: %p", &p);
   return 0;
}
#output
#Value of variable var is: 10
#Value of variable var is: 10
#Address of variable var is: 0x7fff5ed98c4c
#Address of variable var is: 0x7fff5ed98c4c
#Address of pointer p is: 0x7fff5ed98c50

Popularity 10/10 Helpfulness 1/10 Language c

Source: Grepper

Tags: c

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Contributed on Feb 03 2022

Lil Uzi

0 Answers Avg Quality 2/10

function pointer in c

Comment

function pointer in c

general syntax: rtype (*pname)(atype);

with arguments: void (*my_ptr)(int)
without arguments: void (*my_ptr)()

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Source: Grepper

Tags: c function

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Contributed on May 16 2023

Talented Tarantula

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function pointer in c

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// 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;

Popularity 10/10 Helpfulness 1/10 Language c

Source: Grepper

Tags: c

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Contributed on Feb 06 2022

Rich Rabbit

0 Answers Avg Quality 2/10

pointers in C(pointers)

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