Concise way to say equal to set of values in C++

Question

For example I have the following string,

if (str[i] == \'(\' ||
    str[i] == \')\' ||
    str[i] == \'+\' ||
    str[i] == \'-\' ||
    str[i] == \'/\' ||
    s         


        

Answer 1

You can search for single character str[i] in a string with your special characters: std::string("()+-/*").find(str[i]) != std::string::npos