Home Backend Development C++ Detailed explanation and example demonstration of C++sort function

Detailed explanation and example demonstration of C++sort function

Apr 02, 2024 pm 06:39 PM
c++ sort string array arrangement

<p>Summary: The C sort function is used to sort container elements. By default, it sorts in ascending order using the </p> <p><img src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/article/000/000/164/171205434266801.jpg" class="lazy" alt="Detailed explanation and example demonstration of C++sort function"></p> <p><strong>C Detailed explanation and example demonstration of sort function</strong></p> <p><strong>sort function overview</strong></p> <p>sort function is a powerful function in the C Standard Template Library (STL) for sorting container elements. It arranges the elements in a container into ascending or descending order based on specified comparison rules. </p> <p>The function is declared as follows: </p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>template<typename Iter> void sort(Iter first, Iter last);</pre><div class="contentsignin">Copy after login</div></div><p>Among them: </p><ul><li><strong>Iter</strong>: Iterator type pointing to the container element, which can be moved and accessed in the container element. </li><li><strong>first</strong>: Container start iterator, specifying the first element of the range of elements to be sorted. </li><li><strong>last</strong>: Container end iterator, specifying the elements after the last element of the range of elements to be sorted. </li></ul><p><strong>Custom comparison rules</strong></p><p>By default, the sort function uses the <code><</code> operator for comparison, which means it will Container elements are sorted in ascending order. If you wish to sort according to different rules, you can provide a custom comparison function: </p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>bool compare(const Type1& a, const Type2& b) { // 自定义比较规则 } // 在 sort 函数中使用自定义比较函数 sort(first, last, compare);</pre><div class="contentsignin">Copy after login</div></div><p><strong>Practical case</strong></p><p><strong>Example 1: Sorting an array of integers</strong></p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>#include <iostream> #include <algorithm> using namespace std; int main() { int arr[] = {5, 2, 7, 1, 3}; int len = sizeof(arr) / sizeof(arr[0]); sort(arr, arr + len); cout << "排序后的数组:"; for (int i = 0; i < len; i++) { cout << " " << arr[i]; } cout << endl; return 0; }</pre><div class="contentsignin">Copy after login</div></div><p>Output: </p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>排序后的数组: 1 2 3 5 7</pre><div class="contentsignin">Copy after login</div></div><p><strong>Example 2: Sorting an array of strings</strong></p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>#include <iostream> #include <algorithm> using namespace std; int main() { string arr[] = {"apple", "orange", "banana", "kiwi", "mango"}; int len = sizeof(arr) / sizeof(arr[0]); sort(arr, arr + len); cout << "排序后的数组:"; for (int i = 0; i < len; i++) { cout << " " << arr[i]; } cout << endl; return 0; }</pre><div class="contentsignin">Copy after login</div></div><p>Output: </p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>排序后的数组: apple banana kiwi mango orange</pre><div class="contentsignin">Copy after login</div></div>

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