Update the addToTotal function so that the returned lambda returns the current total after adding the input value.

• Implement the addToTotal function to return a lambda that captures total by reference.
• The lambda should take an integer argument, add it to total, and return the updated total value.

In your main function:

• Declare an integer variable named total and initialize it to zero.
• Call addToTotal, passing total as an argument, and assign its return value to a variable named adder.
• Call adder three times with the values 5, 10, and 15, each time printing the return value.
• After the three calls, print the value of total to standard output.