Find the maximum occurrence of a character in a string

#include<stdio.h>
#include<conio.h>

int main() {
   char str[20], ch;
   int count = 0, i,j=0 , max;
   int arr[10];
   printf("\nEnter a string : ");
   scanf("%s", &str);

   printf("\nEnter the character to be searched : ");
   scanf("%c", &ch);
   for (i = 0; str[i] != '\0'; i++) {
      if (str[i] == ch)
         count++;
      else if(count != 0)
      {
          arr[j] = count;
          j++;
          count = 0;
      }
   }
   arr[j]=count;
   max = 0;
       for(i=0;i<=j;i++)
        if(max<arr[i])
         max=arr[i];
   if (max == 0)
      printf("\nCharacter '%c'is not present", ch);
   else
   {
       printf("\nMaximum occurrence of character '%c' : %d", ch, max);
   }
   return (0);
}

   

Output

Enter a string : aabbbaaab

Enter the character to be searched :
Maximum occurrence of character 'a' : 3