Line data    Source code

       1              : // Copyright (c) 2024 The Authors. All rights reserved.
       2              : //
       3              : // Licensed under the Apache License, Version 2.0 (the "License");
       4              : // you may not use this file except in compliance with the License.
       5              : // You may obtain a copy of the License at
       6              : //
       7              : //      https://www.apache.org/licenses/LICENSE-2.0
       8              : //
       9              : // Unless required by applicable law or agreed to in writing, software
      10              : // distributed under the License is distributed on an "AS IS" BASIS,
      11              : // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12              : // See the License for the specific language governing permissions and
      13              : // limitations under the License.
      14              : 
      15              : // Authors: liubang (it.liubang@gmail.com)
      16              : 
      17              : #include <gtest/gtest.h>
      18              : 
      19              : #include <climits>
      20              : 
      21              : namespace {
      22              : class Solution {
      23              : public:
      24            3 :     int reverse(int x) {
      25            3 :         long n = 0;
      26           19 :         while (x != 0) {
      27           16 :             n = n * 10 + x % 10;
      28           16 :             x /= 10;
      29              :         }
      30            3 :         return n > INT_MAX || n < INT_MIN ? 0 : n;
      31              :     }
      32              : };
      33              : } // namespace
      34              : 
      35            4 : TEST(Leetcode, reverse_integer) {
      36            1 :     Solution s;
      37            1 :     EXPECT_EQ(321, s.reverse(123));
      38            1 :     EXPECT_EQ(-321, s.reverse(-123));
      39            1 :     EXPECT_EQ(0, s.reverse(2147483647));
      40            1 : }