Menu: Difference between revisions

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=={{header|C++}}==

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

<lang cpp>#include <iostream>

#include <boost/regex.hpp>

#include <cstdlib>

#include <string>

using namespace std ;

using namespace std;

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

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

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

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 *, int); //function that performs it all

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

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

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

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

cout << '\n' ;

cout << '\n';

return ;

return;

}

printMenu ( terms , size ) ;

printMenu(terms, size);

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

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

string entry ;

~~cin >>~~ entry ;

string entry;

~~bool~~ ~~ok = checkEntry(~~ entry ~~, terms , size )~~ ;

cin >> entry;

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while ( ! ok ) {

~~printMenu~~( terms , size ) ;

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

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while (!ok) {

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

~~cin >> entry~~ ;

printMenu(terms, size);

ok = ~~checkEntry~~ ( ~~entry~~ , ~~terms~~ , size ) ;

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

cin >> entry;

ok = checkEntry(entry, terms, size);

}

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

~~cout << *( terms +~~ number ~~- 1~~ ) ~~<< '\n'~~ ;

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

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cout << terms[number - 1] << '\n' ;

}

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

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

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

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

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

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

}

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

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

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

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

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

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

return false ;

return false;

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

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

if ( number < 1 || number > num )

if (number < 1 || number > num)

return false ;

return false;

return true ;

return true;

}

int main( ) {

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

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

int size = sizeof terms / sizeof *terms ;

int size = sizeof terms / sizeof *terms;

dataEntry( terms , size ) ;

dataEntry(terms, size);

return 0 ;

return 0;

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}</lang>

}

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</lang>

=={{header|Common Lisp}}==