Compilare: main.cpp: In function 'bool isName(char)': main.cpp:24:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses] return (c>='0' && c<='9' || c>='a' && c<='z' || c>='A' && c<='Z'); ~~~~~~~^~~~~~~~~ main.cpp:24:60: warning: suggest parentheses around '&&' within '||' [-Wparentheses] return (c>='0' && c<='9' || c>='a' && c<='z' || c>='A' && c<='Z'); ~~~~~~~^~~~~~~~~