Answers for "pointeri in c"

1

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;
    }
Posted by: Guest on February-13-2022
0

pointer c

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int *ptr, i , n1, n2;
    printf("Enter size: ");
    scanf("%d", &n1);

    ptr = (int*) malloc(n1 * sizeof(int));

    printf("Addresses of previously allocated memory: ");
    for(i = 0; i < n1; ++i)
         printf("%un",ptr + i);

    printf("nEnter the new size: ");
    scanf("%d", &n2);

    // rellocating the memory
    ptr = realloc(ptr, n2 * sizeof(int));

    printf("Addresses of newly allocated memory: ");
    for(i = 0; i < n2; ++i)
         printf("%un", ptr + i);
  
    free(ptr);

    return 0;
}
Posted by: Guest on June-18-2021

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