calloc in cpp code example

Example 1: calloc in C++/C

#include <cstdlib>
#include <iostream>
using namespace std;

int main() {
   int *ptr;
   ptr = (int *)calloc(5, sizeof(int));
   if (!ptr) {
      cout << "Memory Allocation Failed";
      exit(1);
   }
   cout << "Initializing values..." << endl
        << endl;
   for (int i = 0; i < 5; i++) {
      ptr[i] = i * 2 + 1;
   }
   cout << "Initialized values" << endl;
   for (int i = 0; i < 5; i++) {
      /* ptr[i] and *(ptr+i) can be used interchangeably */
      cout << *(ptr + i) << endl;
   }
   free(ptr);
   return 0;
}

Example 2: Calloc C++

void* calloc (size_t num, size_t size);

Example 3: Calloc C++

/* calloc example */
#include <stdio.h>      /* printf, scanf, NULL */
#include <stdlib.h>     /* calloc, exit, free */

int main ()
{
  int i,n;
  int * pData;
  printf ("Amount of numbers to be entered: ");
  scanf ("%d",&i);
  pData = (int*) calloc (i,sizeof(int));
  if (pData==NULL) exit (1);
  for (n=0;n<i;n++)
  {
    printf ("Enter number #%d: ",n+1);
    scanf ("%d",&pData[n]);
  }
  printf ("You have entered: ");
  for (n=0;n<i;n++) printf ("%d ",pData[n]);
  free (pData);
  return 0;
}