Compilare: user.cpp: In function ‘int rez()’: user.cpp:33:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (pnt < v.size() && v[pnt] != conv[')']){ ~~~~^~~~~~~~~~ user.cpp:46:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<now.size(); i++){ ~^~~~~~~~~~~ user.cpp:49:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i+1 < now.size() && (now[i+1] == conv['/'] || now[i+1] == conv['*'])){ ~~~~^~~~~~~~~~~~ user.cpp:67:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<after.size(); i+=2){ ~^~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:99:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<s.size(); i++){ ~^~~~~~~~~ user.cpp:102:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < s.size() && s[i] >= '0' && s[i] <= '9'){ ~~^~~~~~~~~~ user.cpp:109:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i < s.size()){ ~~^~~~~~~~~~ user.cpp:110:34: warning: array subscript has type ‘char’ [-Wchar-subscripts] v.push_back(conv[s[i]]); ^