C++ Vector Operation Change Elements

Step 1: Include the necessary header file for vectors: #include Step 2: Declare a vector of integers: std::vector numbers; Step 3: Add elements to the vector: numbers.push_back(3); numbers.push_back(5); numbers.push_back(7); Step 4: Access and change elements using index: numbers[1] = 10; Step 5: Iterate through the vector using a for loop: for (int i = 0; i < numbers.size(); i++) { std::cout << numbers[i] << " "; } Step 6: Output the modified vector elements: Output: 3 10 7