Answers for "malloc in c++"

malloc c++ example

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

int main()
{
	int *ptr;
	ptr = (int*) malloc(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;
}

malloc() in c and c++

/* malloc example: random string generator*/
#include <stdio.h>      /* printf, scanf, NULL */
#include <stdlib.h>     /* malloc, free, rand */

int main ()
{
  int i,n;
  char * buffer;

  printf ("How long do you want the string? ");
  scanf ("%d", &i);

  buffer = (char*) malloc (i+1);
  if (buffer==NULL) exit (1);

  for (n=0; n<i; n++)
    buffer[n]=rand()%26+'a';
  buffer[i]='\0';

  printf ("Random string: %s\n",buffer);
  free (buffer);

  return 0;
}

cpp malloc

int alloc_size = 10;
int* buffer = (int*) malloc (alloc_size);
//Allocate memory block which can fit 10 integers

malloc in c++

void* malloc(size_t size);