Compilare: main.cpp: In function 'bool EvalExp(int&)': main.cpp:21:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(s[p] == ' ' || (p < s.size() - 1 && (s[p] == 'O' && s[p] == 'R'))) ~~^~~~~~~~~~~~~~ main.cpp: In function 'bool Ands(int&)': main.cpp:39:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(s[p] == ' ' || (p < s.size() - 2 && (s[p] == 'A' && s[p + 1] == 'N' && s[p + 2] == 'D'))) ~~^~~~~~~~~~~~~~ main.cpp: In function 'bool Nots(int&)': main.cpp:66:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(p < s.size() - 2 && (s[p] == 'N' && s[p + 1] == '0' && s[p + 2] == 'T')) ~~^~~~~~~~~~~~~~ main.cpp:71:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(p < s.size() - 3 && (s[p] == 'T' && s[p + 1] == 'R' && s[p + 2] == 'U' && s[p + 3] == 'E')) ~~^~~~~~~~~~~~~~ main.cpp:76:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(p < s.size() - 4 && (s[p] == 'F' && s[p + 1] == 'A' && s[p + 2] == 'L' && s[p + 3] == 'S' && s[p + 4] == 'E')) ~~^~~~~~~~~~~~~~