89 lines
1.3 KiB
C++
89 lines
1.3 KiB
C++
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#include <fstream>
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#include <iostream>
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#include <string>
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enum RPS {
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Rock = 1,
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Paper,
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Scissors,
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};
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RPS ToRPS(char c)
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{
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if(c == 'A' || c == 'X')
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return RPS::Rock;
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else if(c == 'B' || c == 'Y')
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return RPS::Paper;
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else if(c == 'C' || c == 'Z')
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return RPS::Scissors;
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std::cerr << "BAD DATA '" << c << "'." << std::endl;
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exit(-1);
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}
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int RPSScore(RPS rps)
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{
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switch(rps)
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{
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case RPS::Rock:
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return 1;
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case RPS::Paper:
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return 2;
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case RPS::Scissors:
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return 3;
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}
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}
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bool Won(RPS us, RPS them)
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{
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if(us == RPS::Rock && them == RPS::Scissors)
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return true;
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else if(us == RPS::Paper && them == RPS::Rock)
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return true;
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else if(us == RPS::Scissors && them == RPS::Paper)
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return true;
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return false;
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}
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int Points(RPS us, RPS them)
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{
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int rtn = 0;
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// score our play:
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rtn += RPSScore(us);
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// tie:
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if(us == them)
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return rtn + 3;
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// win:
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if(Won(us, them))
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return rtn + 6;
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// loss:
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return rtn;
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}
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int main()
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{
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std::ifstream ifs("data.txt");
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if(!ifs.is_open())
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{
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std::cerr << "Missing data.txt." << std::endl;
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return -1;
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}
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unsigned long total = 0;
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for(std::string line; std::getline(ifs, line); )
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{
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char them = line[0];
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char us = line[2];
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total += Points(ToRPS(us), ToRPS(them));
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}
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std::cout << "Total: " << total << std::endl;
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return 0;
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}
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