C PROGRAM TO COUNT AND PRINT VOWELS IN A GIVEN STRING

/*** THIS C PROGRAM TAKES A LINE OF STRING AS INPUT AND PRINTS THE VOWELS AND THE COUNT OF VOWELS OCCURED IN IT ***/

#include<stdio.h>
#include<conio.h>
#define MAX 100  //limiting the maximum size of string
#define SIZE 5  //we have 5 vowels a,e,i,o,u
main()
{
  int i,j;
  char str[MAX],vowelcount[SIZE];
  char vowels[SIZE]={'a','e','i','o','u'};
  //clrscr();
  printf("\nPROGRAM TO COUNT VOWELS\n");
  printf("\nEnter the String:");
  //scanf("%s",&str); //this allows only a string(single word)
  gets(str); //this allows a line as string

  for(i=0;i<5;i++)
  {
   vowelcount[i]=0;
  }
  for(i=0;str[i]!='\0';i++)
  {
    for(j=0;j<SIZE;j++)
    {
      if((str[i]==vowels[j])||(str[i]==vowels[j]-32))
      {
        vowelcount[j]=vowelcount[j]++;


      }
   }

  }
   for(i=0;i<SIZE;i++) //printing vowels and its count
   {
     printf("\n %c occured:%d times",vowels[i],vowelcount[i]);
   }
    getch();

}

OUTPUT: