Compilare: main.cpp: In function 'void numer_parsing(int&)': main.cpp:48:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | while(i < tokens.size() && isdigit(tokens[i])) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:61:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for(i = 0; i < tokens.size(); i++) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int operatie(int, int, char)': main.cpp:44:1: warning: control reaches end of non-void function [-Wreturn-type] 44 | } | ^