problem with a function

This is a discussion on problem with a function within the C++ Programming forums, part of the General Programming Boards category; i wrote this function to find and return the determinant of a 3x3 matrix... Code: double getDeterminant(double (*matrix)[3]) { double ...

  1. #1
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    Aug 2006
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    problem with a function

    i wrote this function to find and return the determinant of a 3x3 matrix...

    Code:
    double getDeterminant(double (*matrix)[3])
    {
    	double a = matrix[0][0];
    	double b = matrix[0][1];
    	double c = matrix[0][2];
    	double d = matrix[1][0];
    	double e = matrix[1][1];
    	double f = matrix[1][2];
    	double g = matrix[2][0];
    	double h = matrix[2][1];
    	double i = matrix[2][2];
    
    	double det = a(e*i) - (f*h) - b(d*i) - (g*f) + c(d*h) - (e*g);
    
    	return det;
    }
    the error i get is the line with the equation and it says

    "error C2064: term does not evaluate to a function taking 1 arguments"

    thanks for any help you can give me.

  2. #2
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    'a', 'b' and 'c' are not functions. They are variables. If you meant it to be a multiplication (like you would do in maths), you need to add a multiplication operator before the parenthesis. You can omit multiplication operators in maths, but not in C++.

  3. #3
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    Aug 2006
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    ahh ty i feel stupid.

  4. #4
    Registered User
    Join Date
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    Canada
    Posts
    267
    suggestion:
    itd be easier to change double a to i into an array and loop thru it

    OS: Windows 7, XUbuntu 11.10, Arch Linux
    IDE: CodeBlocks
    Compiler: GCC

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