运行 ID: 1623

Main.cc: In function ‘int main()’:
Main.cc:21:3: error: expected ‘;’ before ‘i’
   i++;
   ^
Main.cc:5:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&a);
  ~~~~~^~~~~~~~~