#include #include #include #include #include #include // * EXAMPLE * // Player 1 Player 2 // Picks: 10000 100% 10000 100% // Rock 3320 33% 3353 34% // Paper 3353 34% 3360 34% // Scissors 3327 33% 3287 33% // Wins: 3277 33% 3369 33% // Rock 1077 11% 1132 11% // Paper 1118 11% 1140 11% // Scissors 1082 11% 1097 11% // Draws: 3354 34% 3354 34% // Rock 1103 11% 1103 11% // Paper 1138 11% 1138 11% // Scissors 1113 11% 1113 11% // Losses: 3369 33% 3277 33% // Rock 1140 11% 1118 11% // Paper 1097 11% 1082 11% // Scissors 1132 11% 1077 11% //enum RPS { Rock , Paper , Scissor }; ** should be used std::vector > makeThrows( unsigned int throwN ){ // setting up random std::random_device rd; std::mt19937 r_generator( rd() ); std::uniform_int_distribution<> play( 0 , 2 ); // build data std::vector > out; for ( unsigned int it = throwN ; it-- ; ) out.push_back( std::make_pair( play( r_generator ) , play( r_generator ) ) ); return out; } struct Stats{ unsigned int picks[3] = {0}; unsigned int totWins = 0; unsigned int wins[3] = {0}; unsigned int totLoss = 0; unsigned int loss[3] = {0}; unsigned int totDraws = 0; unsigned int draws[3] = {0}; }; // integer percentage int p100( int a , int b ){ return (float)a / (float)b * 100.0 + 0.5 ; } // reusable output for stats comparsion void line( std::string txt , int tot , int a , int b ){ std::cout << std::setw(10) << std::left << txt << std::setw(8) << std::right << a << std::setw(4) << std::right << p100( a , tot ) << "%" << std::setw(10) << std::right << b << std::setw(4) << std::right << p100( b , tot ) << "%" << std::endl ; } // core function void printStats( const std::vector >& throws ){ /* Note : it would be better to split this in two different functions.. E.g. buildStats(...) printStats(...) */ // collecting data unsigned int totPicks = throws.size(); Stats playerA; Stats playerB; for ( auto it = throws.begin() ; it != throws.end() ; ++it ){ playerA.picks[ it->first ]++; playerB.picks[ it->second ]++; // compute winner // 0 = rock , 1 = paper , 2 = scissors /* \ a 0 1 2 b 0 0 1 2 0=draw 1 2 0 1 1=a 2 1 2 0 2=b {0,1,2}[(a-b+3)%3] */ unsigned int result = (it->first - it->second + 3 )%3; switch ( result ){ case 0 : playerA.totDraws++; playerB.totDraws++; playerA.draws[ it->first ]++; playerB.draws[ it->second ]++; break ; case 1 : playerA.totWins++; playerB.totLoss++; playerA.wins[ it->first ]++; playerB.loss[ it->second ]++; break ; case 2 : playerA.totLoss++; playerB.totWins++; playerA.loss[ it->first ]++; playerB.wins[ it->second ]++; } } // output std::cout << std::setw(23) << std::right << "PlayerA" << std::setw(15) << std::right << "PlayerB" << std::endl; line( "Picks" , totPicks , totPicks , totPicks ); line( "Rock" , totPicks , playerA.picks[0] , playerB.picks[0] ); line( "Paper" , totPicks , playerA.picks[1] , playerB.picks[1] ); line( "Scissors" , totPicks , playerA.picks[2] , playerB.picks[2] ); std::cout << std::endl; line( "Wins" , totPicks , playerA.totWins , playerB.totWins ); line( "Rock" , totPicks , playerA.wins[0] , playerB.wins[0] ); line( "Paper" , totPicks , playerA.wins[1] , playerB.wins[1] ); line( "Scissors" , totPicks , playerA.wins[2] , playerB.wins[2] ); std::cout << std::endl; line( "Draws" , totPicks , playerA.totDraws , playerB.totDraws ); line( "Rock" , totPicks , playerA.draws[0] , playerB.draws[0] ); line( "Paper" , totPicks , playerA.draws[1] , playerB.draws[1] ); line( "Scissors" , totPicks , playerA.draws[2] , playerB.draws[2] ); std::cout << std::endl; line( "Losses" , totPicks , playerA.totLoss , playerB.totLoss ); line( "Rock" , totPicks , playerA.loss[0] , playerB.loss[0] ); line( "Paper" , totPicks , playerA.loss[1] , playerB.loss[1] ); line( "Scissors" , totPicks , playerA.loss[2] , playerB.loss[2] ); } using namespace std; int main() { auto run = makeThrows( 10000 ); printStats( run ); std::cout << "\n\n "; cout << " * * * Winner formula * * *\n\n" " 0 = rock , 1 = paper , 2 = scissors\n" " \\ A 0 1 2 \n" " B + - - -\n" " 0 | 0 1 2 0=draw\n" " 1 | 2 0 1 1=A\n" " 2 | 1 2 0 2=B\n\n"; cout << "Test winner formula `(A-B+3)%3` \n"; cout << "( 0 - 0 + 3 )%3 = " << ( 0 - 0 + 3 )%3 << endl; cout << "( 1 - 0 + 3 )%3 = " << ( 1 - 0 + 3 )%3 << endl; cout << "( 0 - 1 + 3 )%3 = " << ( 0 - 1 + 3 )%3 << endl; cout << "( 1 - 2 + 3 )%3 = " << ( 1 - 2 + 3 )%3 << endl; cout << "( 2 - 0 + 3 )%3 = " << ( 2 - 0 + 3 )%3 << endl; cout << "( 0 - 2 + 3 )%3 = " << ( 0 - 2 + 3 )%3 << endl; return 0; }

Rock Paper Scissors stats