Void Function

[Nazuki]

I declared a void function but when I tried to call it inside a switch statement it would not show up. Does anybody know what mistake I did? I only want to figure out how the void function would appear in the case statement thank you!

 #include <iostream>
#include <string>
#include <fstream>

using namespace std;

const int rowlimit = 10; 

string ar_id [rowlimit] = {};
string ar_name [rowlimit] = {};
string ar_price [rowlimit] = {}; 
string ar_quantity [rowlimit] = {}; 

void ADDITEM ()
{cout << "\t\t\t\t\t\t\b\b\b\b\b\b\b\bID: ";
 cin.getline(id, 100);
 cout << "\t\t\t\t\t\t\b\b\b\b\b\b\b\bNAME: ";
 cin.getline(name, 100);
 cout << "\t\t\t\t\t\t\b\b\b\b\b\b\b\bPRICE: ";
 cin.getline(price, 100);
 cout << "\t\t\t\t\t\t\b\b\b\b\b\b\b\bQUANTITY: ";
 cin.getline(quantity, 100);


for (int x = 0; x < rowlimit; x++)
{
        if (ar_id[x] == "\0")
        {
          ar_id [x] = id;
          ar_name [x] = name;
          ar_price [x] = price;
          ar_quantity [x] = quantity;
          break;
        }
    }
}

int main(){ 
std :: cout  << "MENU\n";
int optionnum;  menu
system ("clear"); 

do { 
cout << "\n     ---------------------------------------------------------------------------------------------" << endl; 
cout << "\t\t\t\t\t\t\b\b\b\b\bMAIN MENU" << endl; 
cout << "     ---------------------------------------------------------------------------------------------" << endl; //print the output
cout << "\t\t\t\t\t\t\b\b\b\b\b\b\b\b[1] - Book a Ticker" << endl; 
cout << "\t\t\t\t\t\t\b\b\b\b\b\b\b\b[2] - Update Information" << endl;  
cout << "\t\t\t\t\t\t\b\b\b\b\b\b\b\b[3] - Cancel a reservation" << endl; 
cout << "\t\t\t\t\t\t\b\b\b\b\b\b\b\b[4] - Show price list" << endl;  
cout << "\t\t\t\t\t\t\b\b\b\b\b\b\b\b[5] - Go back" << endl; 
cout << "     ---------------------------------------------------------------------------------------------" << endl; 
cout << "\n\v\tPick a Number from the Items Above: "; 
cin >> optionnum; 

switch  (optionnum) 
{
    case '1': ADDITEM (); 
    system ("clear"); 
    break; 
}


} while (optionnum != 6); 

return 0; 
}

[AbstractionAnon]

line 58: The problem is your case label, not your function call.
Your case label is '1'. That is an ASCII character. optionnum is an int.
The line should be:

   case  1: ADDITEM (); 

Line 27:

    if (ar_id[x].empty())

is preferred to testing for a null character.