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POHow to enforce explicit Randomness with rand()
 

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  1. POHow to enforce explicit Randomness with rand()
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    <pre><code>#include &lt;iostream&gt; #include &lt;stdlib.h&gt; #include &lt;ctime&gt; class Minesweeper { public: void buildBoards(); void printTopLvlBoard(); void printBottomLvlBoard(); void userEntry(int x, int y); void gameOver(); bool stateGood(); private: static const int CLMN_MAX_SIZE = 5; static const int ROW_MAX_SIZE = 5; char topLvlBoard[ROW_MAX_SIZE][CLMN_MAX_SIZE]; char bottomLvlBoard[ROW_MAX_SIZE][CLMN_MAX_SIZE]; bool gameState; }; void Minesweeper::printTopLvlBoard(){ std:: cout &lt;&lt; "Board" &lt;&lt; std:: endl; for(int i = 0; i &lt; ROW_MAX_SIZE; i++) { for(int j = 0; j &lt; CLMN_MAX_SIZE; j++) { std::cout &lt;&lt; topLvlBoard[i][j]; } std::cout &lt;&lt; std::endl; } } void Minesweeper::buildBoards(){ for(int i = 0; i &lt; ROW_MAX_SIZE; i++){ for(int j = 0; j &lt; CLMN_MAX_SIZE; j++){ bottomLvlBoard[i][j] = 'O'; topLvlBoard[i][j] = 'x'; } } for(int k = 0; k &lt; 5; k++) { bottomLvlBoard[**rand()%5**][**rand()%5**] = 'B'; } gameState = true; } void Minesweeper::printBottomLvlBoard(){ for(int i = 0; i &lt; CLMN_MAX_SIZE; i++){ for(int j = 0; j &lt; ROW_MAX_SIZE; j++){ std::cout &lt;&lt; bottomLvlBoard[i][j]; } std::cout &lt;&lt; std:: endl; } } void Minesweeper::userEntry(int x,int y){ char bottomTmp = bottomLvlBoard[x-1][y-1]; if(bottomTmp == 'O'){ topLvlBoard[x-1][y-1] = '*'; bottomLvlBoard[x-1][y-1] = 'C'; } else if(bottomTmp == 'B'){ gameOver(); } } void Minesweeper::gameOver() { std::cout &lt;&lt; std:: endl; std::cout &lt;&lt; "**********************" &lt;&lt; std:: endl; std::cout &lt;&lt; "**********************" &lt;&lt; std:: endl; std::cout &lt;&lt; "*** BOMB BOMB BOMB ***" &lt;&lt; std:: endl; std::cout &lt;&lt; "*** BOMB BOMB BOMB ***" &lt;&lt; std:: endl; std::cout &lt;&lt; "*** BOMB BOMB BOMB ***" &lt;&lt; std:: endl; std::cout &lt;&lt; "*** BOMB BOMB BOMB ***" &lt;&lt; std:: endl; std::cout &lt;&lt; "**********************" &lt;&lt; std:: endl; std::cout &lt;&lt; "**********************" &lt;&lt; std:: endl; std::cout &lt;&lt; std:: endl; std::cout &lt;&lt; "You have landed on a bomb!" &lt;&lt; std:: endl; std::cout &lt;&lt; std:: endl; printBottomLvlBoard(); gameState = false; } bool Minesweeper::stateGood(){ bool tmpYesNo = (gameState == true) ? true : false; return tmpYesNo; } </code></pre> <p>Is there anyway to enforce explicit randomness via the rand() function? Every time I run this program I get the same predictable pattern of bombs across the grid. Even if I change the seed in main() I still only get a variation of about 3 patterns.</p>
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    1. COSeeding is key. How are you calling srand()?
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    2. COHey!! None of that explicit stuff on Stack Overflow!!
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