Hey guys, I two right a code exactly like this for my class. I have no idea how

Question

Hey guys,

I two right a code exactly like this for my class.
I have no idea how to change the letters could you give me a hintplease

tyson

here is the question

Write a program to encrypt/decrypt the output of a file. Yourprogram should be able to read
characters from a file, encode/decode each character and save theencoded/decoded message
to another file.
Characters are encoded by substituting them with the character thatappears two positions
ahead of it in the ASCII table. 'A' becomes 'C', 'z' becomes '|'and so on.
Stop encoding when you read a '*' in the file.
Characters are decoded by substituting them with the character thatappears two positions
behind it in the ASCII table. 'C' becomes 'A', '|' becomes 'z' andso on.
Stop decoding when you read a ',' in the file.
Your program MUST have at least the following two functions:
• void encodeFile(char inputFileName[], charoutputFileName[]) - that reads and
encodes the characters of the file with name inputFileName andstores it in a file
having name outputFileName.
• void decodeFile(char inputFileName[], charoutputFileName[]) - that reads and
decodes the characters of the file with name inputFileName andstores it in a file
having name outputFileName.
The correct encoding of the string Hello World* is Jgnnq"Yqtnf,

Explanation / Answer

please rate - thanks #include #include using namespace std; void decodeFile(char [], char []); void encodeFile(char [], char []); int main() {    int ende;    char filenamein[20];     char filenameout[20];    cout >filenamein;    cout >filenameout;    coutende;    if(ende==1)        encodeFile(filenamein,filenameout);    else        decodeFile(filenamein,filenameout);       cout

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