Borderou de evaluare (job #617022)

Compilare: main.cpp: In function 'int eval(std::string)': main.cpp:32:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 32 | for(int i=0;i<str.size();i++) | ~^~~~~~~~~~~ main.cpp: In function 'int calculate(int, int, char)': main.cpp:28:1: warning: control reaches end of non-void function [-Wreturn-type] 28 | } | ^