Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:23:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<=s.length()-1; i++) ~^~~~~~~~~~~~~~ user.cpp:26:20: warning: comparison with string literal results in unspecified behavior [-Waddress] if((x>="a" and x<="z") or (x>="A" and x<="Z")) ^~~ user.cpp:26:20: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] user.cpp:26:31: warning: comparison with string literal results in unspecified behavior [-Waddress] if((x>="a" and x<="z") or (x>="A" and x<="Z")) ^~~ user.cpp:26:31: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] user.cpp:26:43: warning: comparison with string literal results in unspecified behavior [-Waddress] if((x>="a" and x<="z") or (x>="A" and x<="Z")) ^~~ user.cpp:26:43: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] user.cpp:26:54: warning: comparison with string literal results in unspecified behavior [-Waddress] if((x>="a" and x<="z") or (x>="A" and x<="Z")) ^~~ user.cpp:26:54: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]