Bit of help required still - using a function with array

Sorry I pasted an earlier code before fixing it, this one compiles but I can't figure out how to make the values go through my function, or if I made it correctly to change input from user into celsius.

Code:

// Computer Lab test.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>
using namespace std;

double c;
double celsius;
double CheckCent(double c)
{
    if ( c>30 )
    {
        return 1.8 * celsius + 32;
    }
	return c;
}


// call this function to convert celsius to fahrenheit (function name is convert)
int _tmain(int argc, _TCHAR* argv[])
{
double myarray[51];
//double i;
int flag;
flag=1;
int i;
for(i = 0; i < 51 && flag == 1; i++)
{   // Loop to enter temperatures - pressing 1 continues, pressing 0 stops //
	cout << "Enter Temperature Reading:";
	cin >>myarray[i];
	cout << "Enter 1 to input more values, 0 to stop";
	cin >>flag;
}// End for
cout << "Number of elements in the array is: " << i;
cout <<"\n";

		return 0;
}

So apart from not compiling, what do you want us to do with than unindented mess?

edited post

So, call the function?

And don't use globals. The first one is not even what you think. The second one seems uninitialized.

Code:

//double c;
//double celsius;
double CheckCent(double c)
{
    double celsius = ?;
    if ( c>30 )
    {
        return 1.8 * celsius + 32; //1.8 * c + 32 ?
    }
	return c;
}

_tmain() and "stdafx.h" are MSVC specific stuff, I think, so your code doesn't compile for many.

> if ( c>30 )
And what do you return if it's <= 30?
The maths works on all values, so why bother with this condition.

You didn't fix the lack of indentation with your edit.

Basically the same question here as well
Array Help Please (user defined size)
Closed (& read the rules)