CRCK, array 1.2

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于 2016-03-27 00:41:35 发布

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分类专栏： Cracking Code

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本文将指导您如何使用C++编程语言编写代码来反转C风格字符串，包括检查字符串长度、定义双指针进行交换操作等关键步骤。

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Write code to reverse a C-Style String. (C-String means that “abcd” is represented as five characters, including the null character.)

// This question is for C/C++ programmer.
// #include <algorithm> if programming in C++. otherwise, need to write an extra swap function.
void reverseString(string input) {
    // first check the input length.
    if(input.size() <= 1) return;
    int left = 0, right = input.size() - 1;
    while(left < right) {
        swap(input[left], input[right]);
        left++;
        right--;
}