why do I get an error for that?
I get the following error :Code:istream* input; int main(int argc, char* argv[]) { switch (argc) { case 1: // read from standard input input = &cin; break; case 2: input = new istringstream(argv[1]); // read argument string break; default : error ("Too many arguments"); return 1; } ...
Error : illegal use of incomplete struct/union/class 'std::basic_istringstream<char, std::char_traits<char>, std::allocator<char>>'
calc.cpp line 94 input = new istringstream(argv[1]); // read argument string