Question

How to get the unique values of an array in C++

Answer 1

#include <vector>
#include <iostream>
#include <algorithm>

std::vector<int> array_unique(const std::vector<int>& arr) {
    std::vector<int> result;
    
    for (int val : arr) {
        if (std::find(result.begin(), result.end(), val) == result.end()) {
            result.push_back(val);
        }
    }
    
    return result;
}

int main() {
    std::vector<int> arr = {1, 2, 1, 1, 3, 3, 4, 4, 5, 5, 5, 5, 6, 7, 7, 8};
    std::vector<int> result = array_unique(arr);

    for (int val : result) {
        std::cout << val << " ";
    }
}

 
 
/*
run:
 
1 2 3 4 5 6 7 8 
 
*/

 

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