Exercise 6:　Simple Functions

1.Write a C program that reads several numbers and uses the function round_to_nearest to round each of these numbers to the nearest integer. The program should print both the original number and the rounded number.

2.Write a program that reads three pairs of numbers and adds the larger of the first pair, the larger of the second pair and the larger of the third pair. Use a function to return the larger of each pair.

3.　　A car park charges a £2.00 minimum fee to park for up to 3 hours, and an additional £0.50 for each hour or part hour in excess of three hours. The maximum charge for any given 24-hour period is £10.00. Assume that no car parks for more than 24 hours at a time.
　　
　　Write a C program that will calculate and print the parking charges for each of 3 customers who parked their car in the car park yesterday. The program should accept as input the number of hours that each customer has parked, and output the results in a neat tabular form, along with the total receipts from the three customers:

　　Car　　　　Hours　　 Charge
　　1　　　　　1.5　　　2.00
　　2　　　　　4.0　　　2.50
　　3　　　　 24.0　　 10.00
　　TOTAL　　 29.5　　 14.50　　　　　　　　　　

　　The program should use the function calculate_charges to determine the charge for each customer.