Menu: Difference between revisions

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

{{incorrect|C++|The <code>dataEntry</code> function should return a string, not void.}}

<lang cpp>#include <iostream>

#include <boost/regex.hpp>

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#include <string>

using namespace std;

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

void printMenu(const string *, int);

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

//checks whether entered data is in required range

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

bool checkEntry(string, const string *, int);

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

string dataEntry(string prompt, 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 "";

return;

}

printMenu(terms, size);

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

string entry;

~~cin~~ ~~>> entry;~~

do {

⚫

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

while (!ok) {

printMenu(terms, size);

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

cout << prompt;

cin >> entry;

ok = checkEntry(entry, terms, size);

}

⚫

while( !checkEntry(entry, terms, size) );

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

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

return terms[number - 1];

}

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

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

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}

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

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

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return true;

}

int main( ) {

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

int size = sizeof terms / sizeof *terms;

dataEntry(terms, size);

cout << "You chose: " << dataEntry("Which is from the three pigs: ", terms, size);

return 0;

}</lang>