Exercise: Write a program sizeof.cpp that uses the sizeof operator to discover the number of bytes needed by short, int, and double variables (and print out this information). For example, cout << short: << sizeof(short) << endl; Then extend the program to show the number of bytes needed for a pointer to a short, a pointer to an int, and a pointer to a pointer to a double. Your output should be:

short: 2

int: 4

double: 8

short*: 8

int*: 8

double*: 8