int main(){ freopen("password.txt","r",stdin); cin>>account>>password; fclose(stdin); freopen("CON","r",stdin);//无效,不能再次输入(百度上说是关闭freopen) int a,b; cin>>a>>b; cout<<a+b; return 0; }
求为什么不能输入A和B了或怎样才能输入A和B