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POHow to declare and initialize static constant strings in classes?
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  1. POHow to declare and initialize static constant strings in classes?
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    copied!<p>I'm writing a Yatzy program for c++ class. We are supposed to print the value of different dice using std::cout. What I want to do is so save a constant string as then just that constant to print the dice out, so rather than using:</p> <pre><code>std::cout &lt;&lt; "-------\n| |\n| * |\n| |\n-------\n" </code></pre> <p>I want to have a constant string with that value and do this:</p> <pre><code>std::cout &lt;&lt; theConstantString; </code></pre> <p>Generic programming wins again!</p> <pre><code>------- | | | * | | | ------- </code></pre> <p>The solution I have for it seems suboptimal to me. This is the relevant code:</p> <p>YatzyIO.h</p> <pre><code>class YatzyIO { private: // Define die constants static const std::string dieOnePrint; static const std::string dieTwoPrint; static const std::string dieThreePrint; static const std::string dieFourPrint; static const std::string dieFivePrint; static const std::string dieSixPrint; void dieOne(); void dieTwo(); void dieThree(); void dieFour(); void dieFive(); void dieSix(); </code></pre> <p>};<br> (there are more code than that in there, I just cut anything that wasn't relevent, which I assume I'm supposed to anyway)</p> <p>Now, outside the implementation of any function in YatzyIO.cpp:</p> <pre><code>const std::string YatzyIO::dieOnePrint = "-------\n| |\n| * |\n| |\n-------\n"; const std::string YatzyIO::dieTwoPrint = "-------\n| * |\n| |\n| * |\n-------\n"; const std::string YatzyIO::dieThreePrint = "-------\n| * |\n| * |\n| * |\n-------\n"; const std::string YatzyIO::dieFourPrint = "-------\n| * * |\n| |\n| * * |\n-------\n"; const std::string YatzyIO::dieFivePrint = "-------\n| * * |\n| * |\n| * * |\n-------\n"; const std::string YatzyIO::dieSixPrint = "-------\n| * * |\n| * * |\n| * * |\n-------\n"; </code></pre> <p>And finally in YatzyIO.ccp I have these functions:</p> <pre><code>void YatzyIO::dieOne() { //output die side 1 std::cout &lt;&lt; dieOnePrint; } </code></pre> <p>(+1 for each die, and it looks similar)</p> <p>This is only lab 2 of 3 I've finished so far, the third replaces these consts with arrays. I was graded on lab 1, which contain this code as well and my teacher said (and I'm translating here since I'm swedish, so whatever is lost in translation I'm sorry!):</p> <p>"It's good that you use member variable so save the different dice output. I suggest you save the different lines (that form the different output) in your member variables instead."</p> <p>What does he mean? Is there a better way to do it? I can't initizalize non-integer constants in the header file. I've tried a bunch of different way, because honestly my solution seems not so optimal to me.</p>
 

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