// Fig. 8.10: fig08_10.cpp
// Converting lowercase letters to uppercase letters
// using a non-constant pointer to non-constant data.
#include <iostream>
using std::cout;
using std::endl;

#include <cctype> // prototypes for islower and toupper
using std::islower;
using std::toupper;

void convertToUppercase( char * );

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

   cout << "The phrase before conversion is: " << phrase;
   convertToUppercase( phrase );
   cout << "\nThe phrase after conversion is:  " << phrase << endl;
   return 0; // indicates successful termination
} // end main

// convert string to uppercase letters
void convertToUppercase( char *sPtr )
{
   while ( *sPtr != '\0' ) // loop while current character is not '\0'
   {   
      if ( islower( *sPtr ) ) // if character is lowercase,
         *sPtr = toupper( *sPtr ); // convert to uppercase

      sPtr++; // move sPtr to next character in string
   } // end while
} // end function convertToUppercase

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