#include<stdio.h>
#include<stdlib.h>//this is the library where malloc,calloc, realloc, and free live


int main(int argc, char *argv[])
{


  /*Static memory C declarations*/
 
  //single variable
  int x;

  //hardcoded size 10 array
  int statarray[10];

  //array of size n
  //int array[n];
  //note, not possible to do array[n] (at least not in proper convention)
  
  //structure
  typedef struct test_{
    int num;
    char name[50];
  }test;

  //array of structures
  test new[10]; 

  

  /*DMA style declarations*/

  //single variable
  int *  single;
  single = (int *)malloc(sizeof(int));
  free(single);

  //hardcoded size 10 array
  int * dmarray;
  dmarray = (int *)malloc(sizeof(int)*10);

  //array size n
  int * narray;
  int n;
  printf("Enter size of array\n");
  scanf("%d",&n);
  narray =(int*)malloc(sizeof(int)*n);
  if(narray)
    printf("Integer Array of Size %d Declared\n",n);
  else
    printf("Failed to Create Array of Size %d\n",n);

  //structure
  typedef struct{
    int * pint;
    char * string;
  }DMA;
  
  DMA * mem;//pointer to a struct object
  mem = (DMA *)malloc(sizeof(DMA));//get memory for the struct
  mem->pint = (int *)malloc(sizeof(int));//get memory for the int
  *(mem).string = (char *)malloc(sizeof(char)*50);//get memory for the string


  //array of structures
  DMA * DMAstructs[10];

  int i;//just a loop var
  for(i =0;i<10;i++)
    {
      DMAstructs[i] = (DMA *)malloc(sizeof(DMA));
      DMAstructs[i]->pint = (int *)malloc(sizeof(int));
      DMAstructs[i]->string = (char *)malloc(sizeof(char)*50);
    }

}