A library keeps each member’s unpaid fine in a vector. Every night, any member who owes money gets $0.50 added to their fine. Members who owe nothing stay at zero.
Complete the function addLateFees, so that:
Before: 0.00 3.50 0.00 12.00 0.50
Night 1: 0.00 4.00 0.00 12.50 1.00
Night 2: 0.00 4.50 0.00 13.00 1.50