/*******************************************************************************************
Name of Program: String Manipulator v1.0

Name of file: Question3.cpp

What the program does: Reads in a string and performs string copy and concatenation using both

array subscripting and pointer/pointer arithmetic

Creator Name: Tom Kralidis

Date: December 10, 1998

Miscellaneous: Uses user entered strings to perform the above.

Forgive the verboseness of the variables, they helped in keeping things clear.

*******************************************************************************************/
#include <iostream.h> 
#include <conio.h> 
#include <string.h>    

//function prototypes

void proc1 ( char UserEnteredWord[80] );
void proc2 ( char *WordPointer );
void proc3 ( char UserEnteredWord[80], int lengthofWord );
void proc4 ( char *WordPointer, int lengthofWord );
void proc5 ( char UserEnteredWord[80], char NewWord[80] );
void proc6 ( char *WordPointer, char *NewWordPointer );
void proc7 ( char UserEnteredWord[80], int lengthofWord, char NewWord[80] );
void proc8 ( char *WordPointer, int lengthofWord, char *NewWordPointer );

int main (void)
{
    char UserEnteredWord[80], *WordPointer;           
    char NewWord[80], *NewWordPointer;  
    char UserDecision;     //utilized for end of program looper
    int ReStart = 1,lengthofWord;  
    WordPointer = UserEnteredWord;//making live pointers
    NewWordPointer = NewWord;
    while (ReStart) //satisfied until user prompts to exit the program
    {
       clrscr();
       UserEnteredWord[0] = NULL; //clearing memory of word and its length       
       lengthofWord = 0;           
       cout << "Key in your favourite word\n" << endl;
       cin >> UserEnteredWord;
       cout << "\n\n";
       lengthofWord = strlen(UserEnteredWord);
       lengthofWord += 1;

       //user input done, function calls follow

       proc1(UserEnteredWord);
       proc2(WordPointer);
       proc3(UserEnteredWord,lengthofWord);
       proc4(WordPointer,lengthofWord);
       proc5(UserEnteredWord,NewWord);
       proc6(WordPointer,NewWordPointer);
       proc7(UserEnteredWord,lengthofWord,NewWord);
       proc8(WordPointer,lengthofWord,NewWordPointer);
 
       cout << "\nContinue?\n\t[Y] Yes\n\t[N] No\n\t" << endl;
       cin >> UserDecision;
       if (UserDecision =='y' || UserDecision == 'Y' )
          ReStart = 1;
       else
	  if ( UserDecision =='n' || UserDecision == 'N')
	  ReStart = 0;
    }
    clrscr();
    cout<<"\n\nTom Kralidis\ttommy@storm.ca\n\n"<<endl;
    return 1;
}

/******************************************************************************************/

//Below are all function definitions

void proc1(char UserEnteredWord[80])
{
       char WordCopyArray[80];
       strcpy(WordCopyArray,UserEnteredWord);
       cout << WordCopyArray << "\tcopied by array" << endl;
}
void proc2(char *WordPointer)
{
       char PointerTemp[80];
       char *NewWordPointer;
       NewWordPointer = PointerTemp;
       strcpy(NewWordPointer,WordPointer);
       cout << NewWordPointer << "\tcopied by pointer" << endl;
}
void proc3(char UserEnteredWord[80], int lengthofWord)
{
       char NArrayWord[80];
       *NArrayWord = NULL;
       strncpy(NArrayWord, UserEnteredWord, lengthofWord);
       cout << NArrayWord << "\tcopied by n array" << endl;

}
void proc4(char *WordPointer, int lengthofWord)
{
       char *WordPointerN;
       char PointerN2[80];
       WordPointerN = PointerN2;
       strncpy(WordPointerN,WordPointer,lengthofWord);
       cout << WordPointerN << "\tcopied by n pointer" << endl;

}
void proc5(char UserEnteredWord[80], char NewWord[80])
{
       strcpy(NewWord,UserEnteredWord);
       strcat(NewWord,UserEnteredWord);
       cout << NewWord << "\tcopied by string cat array" << endl;

}
void proc6(char *WordPointer, char *NewWordPointer )
{
       strcat(NewWordPointer, WordPointer);
       cout<<NewWordPointer<<"\tcopied by string cat pointer"<<endl;

}
void proc7(char UserEnteredWord[80], int lengthofWord, char NewWord[80])
{
       strncat(NewWord, UserEnteredWord, lengthofWord);
       cout << NewWord << "\tcopied by string cat n array" << endl;

}
void proc8 ( char *WordPointer, int lengthofWord, char *NewWordPointer )
{
       strncat( NewWordPointer, WordPointer, lengthofWord );
       cout << NewWordPointer << "\tcopied by string cat n pointer" << endl;
}