rotate code

정수, 문자열을 왼쪽, 오른쪽으로 회전하는 코드

그래프/DSLR/rotate.cpp

@@ -0,0 +1,73 @@
+#include<iostream>
+#include<string>
+#include<cmath>
+#include<algorithm>
+
+using namespace std;
+
+int length(int number) {
+  int n = 0;
+  do {
+    number = int(number/10);
+    n++;
+  } while(number > 0);
+  return n;
+}
+
+int left_rotate(int n, int number) {
+  int pow_number = (int)pow(10, n - 1);
+  return (number % pow_number) * 10 + (number / pow_number);
+}
+
+int right_rotate(int n, int number) {
+  int pow_number = (int)pow(10, n - 1);
+  return (number / 10) + (number % 10) * pow_number;
+}
+
+void left_string_rotate(string &s) {
+  rotate(s.begin(), s.begin() + 1, s.end());
+}
+
+void right_string_rotate(string &s) {
+  rotate(s.rbegin(), s.rbegin() + 1, s.rend());
+}
+
+int main() {
+  int number;
+  string s = "abcdefg";
+
+  int n = 0;
+
+  cin >> number;
+  n = length(number);
+
+
+  cout << number << "를 왼쪽 회전 합니다." << endl;
+  for(int r = 1; r <= n; r++) {
+    number = left_rotate(n, number);
+    cout << "회전 " << r << "번" << ": " << number << endl;
+  }
+  cout << "\n";
+
+  cout << number << "를 오른쪽 회전 합니다." << endl;
+  for(int r = 1; r <= n; r++) {
+    number = right_rotate(n, number);
+    cout << "회전 " << r << "번" << ": " << number << endl;
+  }
+  cout << "\n";
+
+  cout << s << "를 왼쪽 회전 합니다." << endl;
+  for(int r = 1; r <= n; r++) {
+    left_string_rotate(s);
+    cout << "회전 " << r << "번" << ": " << s << endl;
+  }
+  cout << "\n";
+
+  cout << s << "를 오른쪽 회전 합니다." << endl;
+  for(int r = 1; r <= n; r++) {
+    right_string_rotate(s);
+    cout << "회전 " << r << "번" << ": " << s << endl;
+  }
+  cout << '\n';
+  return 0;
+}