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                # 打印數組中排序的不同元素 > 原文: [https://www.geeksforgeeks.org/print-sorted-distinct-elements-array-c/](https://www.geeksforgeeks.org/print-sorted-distinct-elements-array-c/) 給定一個可能包含重復項的數組,請按排序順序打印所有不同的元素。 例子: ``` Input : 1, 3, 2, 2, 1 Output : 1 2 3 Input : 1, 1, 1, 2, 2, 3 Output : 1 2 3 ``` **簡單解決方案**首先對數組進行排序,然后遍歷數組并僅打印元素的第一個匹配項。 **另一種方法**是使用在 C++ STL 中設置的[。](http://www.geeksforgeeks.org/set-in-cpp-stl/) ## C++ ```cpp // CPP program to print sorted distinct // elements. #include <bits/stdc++.h> using namespace std; void printRepeating(int arr[], int size) { ????// Create a set using array elements ????set<int> s(arr, arr + size); ????// Print contents of the set. ????for (auto x : s)? ????????cout << x << " "; } // Driver code int main() { ????int arr[] = { 1, 3, 2, 2, 1 }; ????int n = sizeof(arr) / sizeof(arr[0]); ????printRepeating(arr, n); ????return 0; } ```
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