C Programming: Write a main method that

1) reads characters from the standard input stream using the standard library function getchar().

2) Determines whether each line encodes a valid cipher direction, key pair and data.

3) If the line contains an error, then skip to the end of the line, print an error message, and read the next line.

Each cipher record must be of the form:

Action	lcg_m	,	lcg_c	,	Data
1 char	1-20 char	1 char	1-20 char	1 char	any number of char	1 char

Action:

Must be either e or d, specifying encryption or decryption respectively.

lcg_m:

Specifies a 64-bit positive integer. Must be decimal digits.

lcg_c:

Specifies a 64-bit positive integer. Must be decimal digits.

Data:

Printable ASCII character data to be encrypted or decrypted. Can be empty or arbitrarily long.