Main.cc: In function ‘int main()’: Main.cc:32:35: warning: unknown conversion type character ‘\x0a’ in format [-Wformat=] printf("%.2lf%\n",a1 / n * 100); ^ Main.cc:33:35: warning: unknown conversion type character ‘\x0a’ in format [-Wformat=] printf("%.2lf%\n",a2 / n * 100); ^ Main.cc:34:35: warning: unknown conversion type character ‘\x0a’ in format [-Wformat=] printf("%.2lf%\n",a3 / n * 100); ^ Main.cc:35:35: warning: unknown conversion type character ‘\x0a’ in format [-Wformat=] printf("%.2lf%\n",a4 / n * 100); ^ Main.cc:37:1: error: expected ‘;’ before ‘}’ token } ^