#include <iostream>
#include <cstdlib>
using namespace std;

void countDigits( char *inputString );
void countUpper( char *inputString );
char *toLower( char *inputString );

int main( int argc, char *argv[]){
  
   char *word;
  
   if ( argc > 1 )
      word = argv[1];
   else{
      cout << "You give me nothing to do!" << endl;
      exit(1);
   }
   cout << "The word is " << word << "." << endl;

   countDigits( word );
   countUpper( word );
   char newWord[128];
   strcpy( newWord, toLower( word ) );
   cout << "\"" << word << "\" has been changed to \"" << newWord << "\"\n";

   char *word1 = "testing";
   char *word2 = "TESTING";
  
   if ( strcmp( word1, toLower(word2) ) == 0 )
      cout << word1 << " = " << word2 << endl;
      
   return 0;
}

char *toLower( char *inputString ){
   int i;
   char returnString[128];
  
   for ( i = 0; i < strlen( inputString ); i++)
     returnString[i] = static_cast<char>(tolower( inputString[i] ) );
   returnString[i]='\0';
  
   return returnString;
}

void countUpper( char *inputString ){
   int count(0);
   for (int i = 0; i < strlen( inputString ); i++)
      if ( isupper(inputString[i]) )
         count++;
   cout << inputString << " contains " << count << " uppercase characters." << endl;

   return;
}
void countDigits( char *inputString ){
   int count(0);
   for (int i = 0; i < strlen( inputString ); i++)
      if ( isdigit(inputString[i]) )
         count++;

   cout << inputString << " contains " << count << " digits." << endl;
  
   return;
}

char *toLower( char *inputString );

char* word;

char *word1 = "testing";