Menu: Difference between revisions

<lang C++cpp>#include <iostream>

using namespace std ;

void printMenu( const string * , int ) ; //prints menu

bool checkEntry( string , const string * , int ) ; //checks whether entered data is in required range

void dataEntry( const string * , int ) ; //function that performs it all

void dataEntry ( const string *terms , int size ) {

if ( size == 0 ) { //we return an empty string when we call the function with an empty list

cout << '\n' ;

return ;

printMenu ( terms , size ) ;

cout << "Enter a number from 1 to " << size << " :\n" ;

cin >>string entry ;

boolcin ok = checkEntry(>> entry , terms , size ) ;

bool ok = printMenucheckEntry(entry, terms , size ) ;

cin >> entryprintMenu(terms, size);

okcout =<< checkEntry"Enter (a entrynumber ,from terms1 ,to " << size )<< " :\n";

cout << *( terms +int number - 1= atoi(entry.c_str()) << '\n' ;

void printMenu ( const string *terms , int num ) {

for ( int i = 1 ; i < num + 1 ; i++ ) {

cout << i << ')' << terms[ i - 1 ] << '\n' ;

bool checkEntry( string myEntry , const string *terms , int num ) {

boost::regex e ( "^\\d+$" ) ;

if ( ! ( boost::regex_match( myEntry , e ) ) )

return false ;

int number = atoi( myEntry.c_str( ) ) ;

if ( number < 1 || number > num )

return false ;

return true ;

const string terms[ ] = { "fee fie" , "huff and puff" , "mirror mirror" , "tick tock" } ;

int size = sizeof terms / sizeof *terms ;

dataEntry( terms , size ) ;

return 0 ;