Compilare: user.cpp: In function ‘int main()’: user.cpp:17:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sir.size();i++){ ^ user.cpp:18:23: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(sir[i]>='A'&&sir[i]<='Z'|| sir[i]>='0'&&sir[i]<='9'&&fisiercrt==""){ ^ user.cpp:21:23: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(sir[i]>='a'&&sir[i]<='z'|| sir[i]>='0'&&sir[i]<='9'&&foldercrt==""){ ^ user.cpp:52:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<fisiere.size();i++) ^ user.cpp:11:11: warning: unused variable ‘foldere’ [-Wunused-variable] string foldere[100]; ^