#include <stdio.h>
#include <ctype.h>

int main(void) 
{
   char array[] = "ab.cde";
   printf("%s\n", array);
   for (int i = 0; i < sizeof(array); i++) {
      array[i] = toupper(array[i]);
   }
   printf("%s\n", array);
   return 0;
}