Vectors
A vector is a list that can grow. Add #include <vector>, then create one with its item type in angle brackets: std::vector<int> scores = {8, 6, 9};
scores.push_back(7); adds an item to the end, and scores.size() tells you how many items it holds.
A range-based for loop visits every item in turn: for (int s : scores) { … }
Example (inside main)
std::vector<std::string> pets = {"cat", "dog"};
pets.push_back("fish");
for (std::string p : pets) {
std::cout << p << " ";
}Output
cat dog fish
Vectors count from 0 like JavaScript arrays:
scores[0] is the first item.Your tasks
0 of 4 done- Include the <vector> header
- Create std::vector<int> marks with 3 numbers
- Add a mark with marks.push_back
- Loop over marks and print each one
Tutor
The tutor guides you toward the answer instead of handing it over. It uses your own Claude usage.
Quick check
What does marks.size() return?
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