Compilare: user.cpp: In function ‘int verificare(char)’: user.cpp:10:14: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(c>='a'&&c<='z'||c>='A'&&c<='Z') ^ user.cpp:12:1: warning: control reaches end of non-void function [-Wreturn-type] } ^