Question

How do I send value from one function to another?

I have this example:

/* Include files */
#include <iostream>
#include <string>
#include <limits>
#include <sqlca.h>
#include <sqlcpr.h>
#include <iomanip>
#include <conio.h> // ntuk password masking


/* Declaration of functions and constants used */
#include "Functions.h"

using namespace std;

void fnMainMenu();

void fnLogin()
{
char data[6] = "hello";
fnMainMenu(); // call Main Menu and I want to pass "hello"

}

void fnMainMenu()
{   
cout << "I want to display hello here?";
}

int main()
{   

    fnLogin();
    return 0;
}

How do I do this? The tutorial I found from the net explained showing data on main. Thanks in advance.

Answer 1

You can pass objects to functions as arguments. Here, fnMainMenu takes a reference to a constant std::string object as parameter and prints it out to stdout:

void fnMainMenu(const std::string& msg)
{
  std::cout << msg << "\n";
}

Then fnLogin() can call the function and pass it any string it likes:

void fnLogin()
{
  std::string s = "hello";
  fnMainMenu(s); // call Main Menu and I want to pass "hello"

}