[HELP] Unresolved external symbol

[gunman353]

The error code reads:
Lab7a.obj : error LNK2019: unresolved external symbol "void __cdecl writeData(double (* const)[4],class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > * const,int,int)" (?writeData@@YAXQAY03NQAV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@HH@Z) referenced in function _main

Here is my program code

#include <iostream>
#include <iomanip>
#include <fstream>

using namespace std;

const int NUM_COMPANIES = 6; //rows
const int NUM_QUARTERS = 4; //columns

int main()
{

	void writeData(double[][NUM_QUARTERS], string[], int, int); //function prototype
	string companyNames[NUM_COMPANIES] = { "ABC", "DEF", "GHI", "JKL", "MNO", "GCP" }; //declare a one dimensional string array to hold the names of 6 different companies
	double salesData[NUM_COMPANIES][NUM_QUARTERS] = //a two dimensional double array to hold the sales data for the four quarters in a year
	{ { 40000, 50000, 60000, 70000 },
	{ 35000, 45000, 55000, 65000 },
	{ 25000, 26000, 27000, 28000 },
	{ 31000, 32000, 33000, 34000 },
	{ 42000, 43000, 44000, 45000 },
	{ 10000, 20000, 30000, 40000 } };

	writeData(salesData, companyNames, NUM_COMPANIES, NUM_QUARTERS); // call the function writeData, and pass in what is needed

	system("pause");
	return 0;
}
void writeData(double salesData[][NUM_COMPANIES], string companyNames, int NUM_COMPANIES, int NUM_QUARTERS){  //In Main, call a function WriteData 

		ofstream file("C:\\temp\\data.txt"); // WriteData will create a simple text file - Data.txt file
		
		for (int row = 0; row < 6; row++) // outer loop goes to the next row
		{
			file << companyNames[row]; // the name of the company is on a line followed by the sales data of the 4 quarters.
			for (int col=0; col < 4; col++)// inner loop goes therough the position in the particular row
			{
				file << salesData[row][col] << " "; //write the sales data to the file in order
			}
			file << endl; // after each row is finished, moves to the next line
		}

		file.close(); // close file after completion 
	}

[AbstractionAnon]

Your forward declaration at line 13 does not match your function implementation at line 28.

Line 13 second argument is a string array. Line 28 second argument is a simple string.

Note that your forward declaration should really go before main.

[gunman353]

Thank you. Dumb mistake on my part.