运行 ID: 20783

Main.cc: In function ‘int main()’:
Main.cc:7:16: error: expected ‘)’ before ‘;’ token
  printf("%.2lf";ans)
                ^
Main.cc:7:20: error: expected ‘;’ before ‘)’ token
  printf("%.2lf";ans)
                    ^
Main.cc:8:10: warning: statement has no effect [-Wunused-value]
  return 0;
          ^