Getting parameter values in the scope of another function - c++

Question

I can't figure out how to get the variables of read input into the scope of calculate seats. Despite how I declare the variables short of re-defining them; rows, columns, and the array seatingChart cannot seem to be found by the function calculateSeats.
* Added calculateSeats(seatingChart[rows][columns]); *
int main() {
int seatsSold = 0, oneSeat = 0, seatsTogether = 0, threeSeats = 0, fourSeats = 0, fiveSeats = 0, noSeats = 0, totalSold = 0,
rows, columns, pecentageSold, i;
const int SIZE = 50;
char seatingChart[SIZE][SIZE];
readInput(rows, columns, seatingChart[rows][columns]); // Call read input.
// Values of read input are then passed to calculate values.
calculateSeats(seatsSold, oneSeat, seatsTogether, threeSeats, fourSeats, fiveSeats, noSeats, i);
// Calculated valus are then declared as calculated values and passed to write output.
/* int calculatedValues = calculateSeats(seatsSold, oneSeat = 0, seatsTogether = 0, threeSeats = 0,
fourSeats = 0, fiveSeats = 0, noSeats = 0); */
// Function is called to write the output.
writeOutput(seatsSold, oneSeat, seatsTogether, threeSeats, fourSeats, fiveSeats, noSeats, pecentageSold, totalSold);
return 0; // Program ends.
}
// Function is needed for assigning values to the char array. Values are then passed from read to calculate.
int readInput(int & rows, int & columns, int i) {
const int SIZE = 50;
int seatingChart[SIZE][SIZE];
ifstream inputFile;
inputFile.open("SeatingChart.txt");
for (rows; rows < SIZE; rows++) { // Step through the valueless array and give the array values.
for (columns; columns < SIZE; columns++)
inputFile >> seatingChart[rows][columns]; // Assign the array values from the input file.
}
inputFile.close();
calculateSeats(seatingChart[rows][columns]);
return 0;
}
// Function is needed just for calculations. Values are then passed from calculate to write output.
void calculateSeats(int & seatsSold, int & oneSeat, int & seatsTogether, int & threeSeats,
int & fourSeats, int & fiveSeats, int & noSeats, int & sixSeats) {
for (int count = 0; count < rows; count++) { // Step back through the array with loaded values.
for (int num = 0; num < columns; num++) {
// If equal to A and count is equal to count++. Then consecutive read chars is true.
if (seatingChart[count][num] == 'A' && seatingChart[count][num] == seatingChart[count][num]++) {
seatsTogether++;
if (seatsTogether > 1) {
threeSeats++;
if (seatsTogether > 2) {
fourSeats++;
}
if (seatsTogether > 3) {
fiveSeats++;
}
if (seatsTogether > 4) {
sixSeats++;
}
}
}
else {
seatsSold++;
cout << "Total seats sold: " << seatsSold << endl;
if (seatsSold == 6) {
cout << "Rows with no seats available: " << "row" << seatingChart[count] << endl;
}
}
}
}
}

Answer 1

You are declaring rows, columns and seating chart in the scope of main.
This variables lay on the stack. If you want them to make visible in readInput you have to declare them as globals. So it should look like this.
int row, column;
char seatingChart[SIZE][SIZE];
int main()
{
//your code
}
Globals are considered as bad style.
http://en.wikipedia.org/wiki/Global_variable