Using multiple conditions in an if statement in C++ -

i trying create complex if statement in c++ save me writing whole bunch of if statements, wondering if code below makes sense or overlooking error.

if(input==choice) {         cout << "tie!" << endl; }else if(input=="rock" && choice=="scissors"      || input=="scissors" && choice=="paper"      || input="paper" && choice=="rock") {         cout << input " beats " << choice << ", win!" << endl; }else if(input=="rock" && choice=="paper"     || input=="scissors" && choice=="rock"     || input=="paper" && choice=="scissors"){         cout << choice << " beats " << input << ", lose!" << endl; } 

what trying achieve is:

"if input x , choice y, or if...." 

basically i'm testing multiple "if-and" conditions single line of code execute if hits of if-and conditions. output throws "no match 'operator||'" error.

you have typo in input="paper" && choice=="rock"), instead of fixing typo suggest fix code. no wonder made typo in giant block of conditions. have lots of repetion , mixing logic output. if spend lines on includes, can save on code...

#include <iostream> #include <string> #include <vector> #include <utility> #include <algorithm>  bool win(const std::string& input, const std::string& choice) {     static const std::vector<std::pair<std::string, std::string>> wins =              { { "rock", "scissors" },               { "scissors", "paper"  },               { "paper", "rock" }             };     return std::find(wins.begin(), wins.end(), std::make_pair(input, choice))         != wins.end(); }  int main() {     std::string choice = "paper";     std::string input = "scissors";     if (win(choice, input)) { std::cout << "you win! \n"; }     else                    { std::cout << "you lose! \n"; } } 

as next step should eliminate strings, eg using enums discussed in comments.