Difficulty: 2/10

Date added: 16th of June 2008

In this exercise, you must argue why all the ten function declarations below are strange and how these can be improved. Assume all correct header files are #included and all user-defined data types are defined.


// 0) Get the number of rows in a database

const int GetRows(const Database d);

 

// 1) Declare the main function

void main();

 

// 2) Set a value in a y-x-ordered 2D-vector

void Set(std::vector<std::vector<double> >& v, const int y, const int x, const double value);

 

// 3) Get the sum of a std::vector

const int Sum(std::vector<int> v);

 

// 4) Swap two values

const int Swap(int& a, int& b);

 

// 5) Put the text 'Hello' on screen and return an error code

const int SayHello(); //Return an integer error code

 

// 6) Set a value in an x-y-ordered 2D-vector

void Set(std::vector<std::vector<double> >& v, const int& i, const int& j, const double& value);

 

// 7) Calculate the mean and standard deviation of a std::vector

const double MeanAndStdDev(const std::vector<double>& v, double& mean);

 

// 8) Display a Widget on screen using std::cout

void CoutWidget(const Widget& w);

 

// 9) Assign a color to a certain square on a Rubiks' cube

void SetSquare(const Square& s, const Color& c, RubiksCube& c);

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(C++) Exercise #2: correct function declarations

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