So what happens when you want to change each of the values within a vector?
You can use a for loop!
For example, suppose we have an int vector that looks like this:
You can write a for loop that iterates from 0 to vector.size(). And here’s the cool part: you can use the counter of the for loop as the index! Woah.
This will change the vector to:
Here, we incremented i from 0 to vector.size(), which is 3. During each iteration, we are adding 10 to the element at position i:
- When
i = 0, we added 10 tovector[0] - When
i = 1, we added 10 tovector[1] - When
i = 2, we added 10 tovector[2]
Instructions
In the code editor, there is a double vector named delivery_order that is storing the prices of some food items.
There is also a double variable named total that’s already declared and initialized.
Write a for loop that iterates through the delivery_order vector (from 0 to delivery_order.size()). And add each order to total during each iteration.
Output the final total using std::cout.