Week 3: Thursday
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Q1. (50)

Write a program using the function getchar() that inputs a real number and
prints the double of it using putchar(). You are not allowed to use scanf or
printf. You can use ascii code information to convert characters to integers.

Example:
If input is
-23.45
output is
-46.9

Q2. (50)

Input 10 numbers in the range 1 to 20 and output their mode.  Ignore any other
input.  Mode is defined as the most frequently occurring object of a set.  If
there is more than one mode, print the largest one.
Example: Input 4 4 1 2 2 3 has mode 4.