运行 ID: 281

Main.cc: In function ‘int main()’:
Main.cc:6:18: warning: statement has no effect [-Wunused-value]
  if(b==4||b==6) c==30;
                 ~^~~~
Main.cc:16:10: error: expected ‘}’ at end of input
  return 0;
          ^
Main.cc:4:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&a,&b);
  ~~~~~^~~~~~~~~~~~~~~