Can't get this program to compile

[thatwhiteguy]

I am trying to get this program to compile and it is not working. I am new to c ++ and frustrated beyond belief. Please help.

#include "stdafx.h"
#include <iostream>



using namespace std ;

int binomial(int n, int k) ; // function prototype

int main(int argc, char**argp)

{

int n, k ; // parameters for the binomial number
int result ;

cout << endl ;

// read in n & k

cout << "Enter n (positive integer) : " ;
cin >> n ;

cout << "Enter k (positive integer) : " ;
cin >> k ;

result = binomial (n,k) ;

cout << "Binomial number " << n << "C" << k
<< " = " << result << endl ;

system("PAUSE");
return (0) ;
}

// ************************************************** ******

binomial(int n, int k)

/* Computes the binomial coefficient nCk */
/*?????????????????????????????????????? */
/* Inputs:?????????????????????????????? */
/*??? n, k (integers)????????????????? ??*/
/*?????????????????????????????????????? */
/* Output:?????????????????????????????? */
/*??? binomial coefficient nCk (integer) */

{
int numerator , denominator ;
int i ; // needed to compute numerator & denominator

if (n < k)
{
return("Error") ;
}
else
{
denominator = 1 ; // initial value

for (i = 0 ; i <= k+1 ; i = i+1 )
denominator = (i * denominator) ;

numerator = (((n - k) + i) * numerator) ;

return (numerator/denominator) ;
} // else

return 0;
}

[seforo]

Obvious error:
Firstly you forgot to put the return type of binomial; you should do this

int binomial(int n, int k)
{
//your function goes here
}

Secondly, the return type of binomial is integer so this statement
if (n < k)
return("Error") ;
}
is wrong. you should return a number not "Error"

Others then should be logical errors, but your function should now compile

[thatwhiteguy]

I appreciate the help. It did work, and my program can now compile. I have got the program to where it returns a value when n is less than k. However if it is not I get an error from microsoft and the program shuts down. I have been going over it for hours and just can't seem to find the problem. Thanks

int binomial (int n, int k)

/* Computes the binomial coefficient nCk */
/*?????????????????????????????????????? */
/* Inputs:?????????????????????????????? */
/*??? n, k (integers)????????????????? ??*/
/*?????????????????????????????????????? */
/* Output:?????????????????????????????? */
/*??? binomial coefficient nCk (integer) */

{
int numerator , denominator ;
int i ; // needed to compute numerator & denominator

if (n < k)
{
return(0) ;
}
else
{
denominator = 1 ; // initial value
numerator = 1 ;
for (i = 0 ; i <= k+1 ; i = i+1 )
{
denominator = (i * denominator) ;

numerator = (((n - k) + i) * numerator) ;
}

return (numerator/denominator) ;
}// else}
}

[weaknessforcats]

When i is 0 your denominator is 0. That's gonna be a long, long divide.