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resolving LNK2019 & LNK1120

mattzorx (21)
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//functions.cpp

#include <iostream>
using namespace std;

bool isValidPkg(	char p	)								//checkpkg
{
	return (p>='A' && p<='C') || (p>='a' && p<='c');
}

char getValidPkg()											//getpkg
{
	char p=0;

	do
	{
		cout<<"Enter pkg: ";
		cin>>p;
	}
	while(	!isValidPkg(p)	);

	return p;
	
}

bool isValidHrs(	int h	)								//checkhrs
{
	return (h>=0 && h<=720);
}

char getValidHrs()											//gethrs
{
	int h;

	do
	{
		cout<<"Enter hours: ";
		cin>>h;
	}
	while(	!isValidHrs(h)	);

	return h;
}

double calculateCharges(int h, char p)						//calculatecharges
{
	double sum;
	
	switch(p)
	{
	case 'a':
		sum=15+(h-50)*2;
		break;
	case 'A':
		sum=15+(h-50)*2;
		break;
	case 'b':
		sum=20+(h-100)*1.5;
		break;
	case 'B':
		sum=20+(h-100)*1.5;
		break;
	case 'c':
		sum=25+(h-150)*1;
		break;
	case 'C':
		sum=25+(h-150)*1;
		break;
	}
	return sum;
}



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//program5.cpp

#include <iostream>
using namespace std;

#include "functions.h"

void main()
{
	char pkg;
	pkg = getValidPkg();
	cout<<"Pkg: "<<pkg<<endl;
	
	int hrs;
	hrs = getValidHrs();
	cout<<"Hrs: "<<hrs<<endl;
	
	double sum;
	sum = calculateCharges();
	cout<<"Bill: "<<sum<<endl;


}//endmain 



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//functions.h

char getValidPkg();

char getValidHrs();

double calculateCharges();



Error 1 error LNK2019: unresolved external symbol "double __cdecl calculateCharges(void)" (?calculateCharges@@YANXZ) referenced in function _main program5.obj

Error 2 fatal error LNK1120: 1 unresolved externals C:\Users\mattb\Documents\Visual Studio 2008\Projects\program5\Debug\program5.exe


Last edited on
guestgulkan (2942)
it is as it says:
unresolved external symbol double calculateCharges(void)

Where is this function?
mattzorx (21)
in my main, which is program5.cpp right? so-

double sum;
sum = calculateCharges('something goes in here'???);
cout<<"Bill: "<<sum<<endl;
guestgulkan (2942)
yes, because you have defined a calculateCharges function to take 2 parameters .See line 45 in your original code posting.


mattzorx (21)
now i get two errors for "expected primary expression" before int and char in the main
mattzorx (21)
update:

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//program5.cpp

#include <iostream>
using namespace std;

#include "functions.h"

int main()
{
	char pkg;
	pkg = getValidPkg();
	cout<<"Pkg: "<<pkg<<endl;
	
	int hrs;
	hrs = getValidHrs();
	cout<<"Hrs: "<<hrs<<endl;
	
	double sum;
	sum = calculateCharges(hrs, pkg);
	cout<<"Bill: "<<sum<<endl;


}//endmain


errors:
functions.h:16: error: too many arguments to function 'double calculateCharges()'
/Users/mattbergeron/Documents/program5/program5.cpp:28: error: at this point in file
mcleano (922)
line 19: sum = calculateCharges(hrs, pkg);

'calculateCharges' is taking two arguments when you call it, but its definition states that it doesn't take any.

Change in functions.h line 7 to: double calculateCharges(int h, char p);
Last edited on
kbw (9488)
You need to change the declaration of calculateCharges inf functions.h to match the actual definition in functions.cpp. They can't be different, the have to be the same.
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