Compilare: user.cpp: In function ‘int evalueaza()’: user.cpp:25:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < s.size() && s[i] == "OR"){ ^ user.cpp: In function ‘int termen1()’: user.cpp:35:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < s.size() && s[i] == "AND"){ ^ user.cpp: In function ‘int termen2()’: user.cpp:45:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < s.size() && s[i] == "NOT"){ ^ user.cpp: In function ‘int factor()’: user.cpp:57:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i < s.size() && s[i] == "("){ ^ user.cpp:62:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(i < s.size() && s[i] == "TRUE"){ ^ user.cpp:66:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(i < s.size() && s[i] == "FALSE"){ ^ user.cpp:70:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(i < s.size()){ ^ user.cpp:71:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] r = val[s[i][0]]; ^ user.cpp: In function ‘int main()’: user.cpp:84:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < str.size(); ++ i) ^ user.cpp:108:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] val[ch] = 1 - val[ch]; ^ user.cpp:108:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] val[ch] = 1 - val[ch]; ^