Remove Duplicates from a Vector in Three Steps

Step 1: Include Necessary Headers

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

Step 2: Create and Populate the Vector

First, you need to create a vector and populate it with some elements.

std::vector<int> vec = {1, 2, 3, 2, 4, 3, 5};

Step 3: Remove Duplicates

Use the `std::sort` and `std::unique` functions to remove duplicates.

// Sort the vector
std::sort(vec.begin(), vec.end());

// Remove duplicates
vec.erase(std::unique(vec.begin(), vec.end()), vec.end());

Conclusion

Removing duplicates from a vector in C++ can be easily accomplished with three simple steps: including necessary headers, creating and populating the vector, and using `std::sort` and `std::unique`. This method ensures that your vector contains only unique elements, making it efficient for further processing.