Exercise 1

Write a program in C Language to calculate the area and circum of a circle,

Note:

define PI =3.14

use double radius

Exercise 2

Write a C function which accepts an integer representing size of memory in GB. The function should return the equivalent size of memory in MB and KB.

For example, if the input is 20, the outputs should be 20480 and 20971520. Note that 1GB = 1024 MB and 1GB = 1024 * 1024 KB.