// Converting lowercase letters to uppercase letters
// using a non-constant pointer to non-constant data
#include <iostream.h>
#include <ctype.h>

void convertToUppercase(char *);

main()
{
   char string[] = "characters and $32.98";

   cout << "The string before conversion is: " << string << endl;
   convertToUppercase(string);
   cout << "The string after conversion is:  " << string << endl;
   return 0;
}

void convertToUppercase(char *sPtr)
{
   while (*sPtr != '\0') {

      if (*sPtr >= 'a' && *sPtr <= 'z')
	 *sPtr = toupper(*sPtr);  // convert to uppercase letter

      ++sPtr;  // increment sPtr to point to the next character
   }
}