PLEASE HELP ME WRITE/ MAP OUT THE CODE IN VISUAL STUDIO

In this part, your program uses two files as the input. A file Key.dat contains the index table, i.e., a sequence of characters where the first character represents 0, the second character represents 1, and so on the last character represents 63. Your program should use this table to encode a text given in the other file named Raw.dat into Base64 format. Your program creates an output file Encoded.dat that should be formatted as shown in the example below, it means characters are separated into groups of 8 with a space between them; each line should contain 6 groups.

INPUT FILES:

Key.dat

ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456 789+/

Raw.dat

Reserve your right to think, for even to think wrongly is better than not to think at all. --Hypatia

OUTPUT FILE:

Encoded.dat

4oCcUmVz ZXJ2ZSB5 b3VyIHJp Z2h0IHRv IHRoaW5r LCBmb3Ig ZXZlbiB0 byB0aGlu ayB3cm9u Z2x5IGlz IGJldHRl ciB0aGFu IG5vdCB0 byB0aGlu ayBhdCBh bGwu4oCd IC0tSHlw YXRpYQ==