תרגיל 5 סעיף א - שדרוג

   #include <stdio.h>
  int my_strlen(const char str[])
  {
     int counter = 0;
     while (str[counter] != '\0')
          counter++;
   return counter;
  }


  int my_strcmp(const char str1[], const char str2[], int idx1, int idx2, int size)
   {
   int i;

      for (i = 0; i <= size; i++)
      if (str1[idx1 + i] != str2[idx2 + i]) return 0;

   return 1;
   }


  int strcmp_size(const char str1[], const char str2[], int size)
 {
int idx1, idx2;

     for (idx1 = 0; idx1 < my_strlen(str1); idx1++) {
     for (idx2 = 0; idx2 < my_strlen(str1); idx2++) {
           if (my_strcmp(str1, str2, idx1, idx2, size) == 1) return 1;   }      }

      return 0;
  }


 int longest_substring(const char str1[], const char str2[])
  {
int size;

      for (size = my_strlen(str1); size > 0; size--)
         if (strcmp_size(str1, str2, size) == 1)
           return size;

     return 0;
 }