int someFunc(double, int);
int main(int nNumberofArgs, char* pszArgs[])
{
someFunc(1,2);
}
int someFunc(double arg1, int arg2)
{
//......do something
}

// SquareDemo - demonstrate the use of a function
//              which processes arguments

#include <cstdio>
#include <cstdlib>
#include <iostream>
using namespace std;

// square - returns the square of its argument
//          doubleVar - the value to be squared
//          returns - square of doubleVar
double square(double doubleVar)
{
    return doubleVar * doubleVar;
}

// sumSequence - accumulate the square of the number
//               entered at the keyboard into a sequence
//               until the user enters a negative number
double sumSequence(void)
{
    // loop forever
    double accumulator= 0.0;
    for(;;)
    {
        // fetch another number
        double dValue = 0;
        cout << "Enter next number: ";
        cin  >> dValue;

        // if it's negative...

        if (dValue < 0)
        {
            // ...then exit from the loop
            break;
        }

        // ...otherwise calculate the square
        double value = square(dValue);

        // now add the square to the
        // accumulator
        accumulator= accumulator + value;
    }

    // return the accumulated value
    return accumulator;
}

int main(int nNumberofArgs, char* pszArgs[])
{
    cout << "This program sums multiple series\n"
         << "of numbers squared. Terminate each sequence\n"
         << "by entering a negative number.\n"
         << "Terminate the series by entering two\n"
         << "negative numbers in a row\n"
         << endl;

    // Continue to accumulate numbers...
    double accumulatedValue;
    for(;;)
    {
        // sum a sequence of numbers entered from
        // the keyboard
        cout << "Enter next sequence" << endl;
        accumulatedValue = sumSequence();
        
        // terminate if the sequence is zero or negative
        if (accumulatedValue <= 0.0)
        {
            break;
        }

        // now output the accumulated result
        cout << "\nThe total of the values squared is " 
             << accumulatedValue 
             << endl;
    }
    
    cout << "Thank you" << endl;

    // wait until user is ready before terminating program
    // to allow the user to see the program results
    system("PAUSE");
    return 0; 
}

int someFunc(double x, int y)
{
    return something(x, y);
}

int someFunc(double, int);   // error:  someFunc is already defined

int main(int nNumberofArgs, char* pszArgs[])
{

    someFunc(1,2);

}

int someFunc(double, int);   // required so we call it

int main(int nNumberofArgs, char* pszArgs[])
{

    someFunc(1,2);

}

int someFunc(double x, int y)
{
    return something(x, y);
}