Mã chấm: 269196

Main.cc: In function ‘int main()’:
Main.cc:17:31: error: expected ‘)’ before ‘;’ token
  printf("%.5lf",round( 4*tong);
                               ^
Main.cc:10:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~