![](http://img.e-com-net.com/image/info8/b8d97b5613f94ed2ba791cad57d0b2ed.gif)
![](http://img.e-com-net.com/image/info8/2f88dd3f1cd145f59c0e47b51acdbd4b.gif)
#includeusing namespace std; int main() { int n; while (cin >> n, n != 0) { int m=1; for (int i = 1;i < n;++i) { m = (m + 1) * 2; } cout << m << endl; } return 0; }
有时候仅仅对结果进行找规律即可不必在过程中找规律。
#includeusing namespace std; int main() { int n; while (cin >> n, n != 0) { int m=1; for (int i = 1;i < n;++i) { m = (m + 1) * 2; } cout << m << endl; } return 0; }
有时候仅仅对结果进行找规律即可不必在过程中找规律。
转载于:https://www.cnblogs.com/hansichen/p/7134408.html