Rubrica (file testo)

/*
Studente : Scia Massimiliano
Classe : 3IC
Data : 12/04/12 15:51
Nome del file : rubrica disordinata, file di testo
*/

#include <iostream>
#include <cmath>
#include <ctime>
#include <cstdlib>
#include <cctype>
#include <windows.h>
#include <fstream>
#include <time.h>
#include <string>
#include <stdio.h>
#define N 100

using namespace std;

void bg_col(){
    system("color 71");
}//bg_col

void end(void){
    fflush(stdin);
    cout<<"\n\nPremere Invio per continuare.";
    getchar();
}//end

void ins_address(char* fileName, char* mode){
     char contact[N];
     FILE* myFile;
     myFile=fopen(fileName,mode);
     cout<<"\nInsert contacts as the example (surname , name , number)";
     cout<<"\nEx...'Cavani , Edinson , 098727621'";
     cout<<"\nPress ' . ' to end\n";
     fflush(stdin);
     cin.get(contact,N,'\n');
     fflush(stdin);
     while(strcmp(contact,".") != 0){
          fputs(contact, myFile);
          fputc('\n', myFile);
          fflush(stdin);
          cin.get(contact,N,'\n');
          fflush(stdin);
     }//while
     fclose(myFile);
}//ins_address


bool is_created(char* fileName){
     if(fopen(fileName,"r")==NULL)
         return false;
     else
         return true;
}//is_created



int main(){
    char fileName[N];
    char mode[N];
    bg_col();
    fflush(stdin);
    cout<<"\nInsert filename (with .txt extension):";
    cout<<"\nEx. myFile.txt\n- ";
    cin.get(fileName,N,'\n');
    fflush(stdin);
    bool b=is_created(fileName);
    char c,cc;
    if(b){
        cout<<"\n\nThe file already exist, overwrite? (s / n)";
        cout<<"\n\n o = overwrite, q = write in queue, c = create new";
        cout<<"\n- ";
        do{
          cin>>c;
          if(c!='o' && c!='q' && c!='c')
             cout<<"\nChoice error\n- ";
        }//do
        while(c!='o' && c!='q' && c!='c');
        if(c=='o')
              ins_address(fileName, "w");
        else if(c=='q')
              ins_address(fileName, "a");
        else{
              strcat(fileName,"_1");
              ins_address(fileName, "w");
        }//else
    }//if
    else{
        cout<<"\nThe file searched is not available";
        cout<<"\n\nCan i create a new one? (s/n)";
        cout<<"\n\n y = yes, n = no";
        cout<<"\n\n- ";
        do{
           cin>>cc;
           if(cc!='y' && cc!='n')
               cout<<"\nChoice error\n- ";
        }//do
        while(cc!='y' && cc!='n');
        if(cc=='y')
              ins_address(fileName, "w");
        else
              cout<<"\n\nAloha! :)";
    }//else
    end();
    return 0;
}//main