Compilare: user.cpp: In function ‘int main()’: user.cpp:16:11: warning: unused variable ‘n’ [-Wunused-variable] int i,n; ^ user.cpp: In function ‘void folder()’: user.cpp:53:22: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] while (s[p]>='a' && s[p]<='z' || s[p] >= '0' && s[p] <= '9') ^ user.cpp: In function ‘int main()’: user.cpp:19:21: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(s,256,fin); ^