error LNK2019: unresolved external symbol "double __cdecl setTotalCost(void)"

[Rafael Douglas]

Hello All, I was writing a program and ran across this error:

error LNK2019: unresolved external symbol "double __cdecl setTotalCost(vo id)" (?setTotalCost@ @YANXZ) referenced in function _main
1>c:\users\rafa el jr\documents\vi sual studio 2010\Projects\I nventory CS226\Debug\Inv entory CS226.exe : fatal error LNK1120: 1 unresolved externals

Can anyone please tell me where my error is or what i'm doing wrong?


here is my code:

#include <iostream>
#include <string>
#include "Inventory.h"
#include <limits>
/*using std::cin;
using std::cout;
using std::endl;	*/
using namespace std;

int main()
{
	int itemNumber, quantity;
	double cost;
	bool failed;
	Inventory uItem;
	double setTotalCost(); //function prototype
	do
		{
		// User entering Item Number
		uItem.setItemNumber(1);
		cout<< "Please enter the Item number: "<< endl;
		cin>> itemNumber;
		if(itemNumber < 0 || itemNumber > 100 )
		{
			cout << "Sorry we do not accept negative values for Item Number" << endl;
			failed=true;
		}
		else
		{
			failed=false;
			cout << "Item Number entered: "<< itemNumber<< endl;
		}while (failed == true ||  itemNumber < 0 );  // If user enters 0, then exit out


		// User entering Quantity Amount
		uItem.setQuantity(1);
		cout<< "Please enter the Quantity Amount: "<< endl;
		cin>> quantity;
		if(quantity < 0 || quantity > 100 )
		{
			cout << "Sorry we do not accept negative values for the Quantity Amount" << endl;
			failed=true;
		}
		else
		{
			failed=false;
			cout << "Quantity Amount entered: "<< quantity<< endl;
		}while (failed == true ||  quantity < 0 );  // If user enters 0, then exit out


		// User entering Cost
		uItem.setCost(1);
		cout<< "Please enter the Cost of the Item: "<< endl;
		cin>> cost;
		if(cost < 0 || cost > 100 )
		{
			cout << "Sorry we do not accept negative values for the Item Cost" << endl;
			failed=true;
		}
		else
		{
			failed=false;
			cout << "Item Cost entered: "<< cost<< endl;
		}
		}while (failed == true ||  cost < 0 );  // If user enters 0, then exit out


		// Calculation of Total Cost
		cout<< " What is the Total Cost? "<<endl;
		cout<< " The Total Cost is: "<< "$" <<setTotalCost<<endl;

		system("pause");
		return 0;
	}

[horace1]

the linker is unable to find the function prototyped in the statement

double setTotalCost(); //function prototype

have you spelt the name correctly? is it in another .cpp file?
also when you call it

cout<< " The Total Cost is: "<< "$" <<setTotalCost<<endl;

you have missed the ()

[Oralloy]

Actually, the use of setTotalCost in the output line will likely just print the hex value of the address of the function. That's a logic error, not a coding error.

The other thing to check is that you didn't spell the word differently in two places - setTotalCost and SetTotalCost are two different function names.

Lastly, make sure you aren't compiling setTotalCost as a "C" function or placing it in a different namespace from your main(...)

Good luck with your assignment.

Oralloy