Compilare: user.cpp: In function ‘int main()’: user.cpp:10:36: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] while(f>>noskipws>>c){if(c>='A'&&c<='z'||c>='0'&&c<='9')lm++; ^ user.cpp:11:66: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] else if(c>=' '&&c<'?'&&lm>0&&(d>='A'&&d<='z'||d>='0'&&d<='9'))l++; ^