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

[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