This is the code to decode a message that I have previously encrypted using the

Question

This is the code to decode a message that I have previously encrypted using the same 'key' in both programs! I would like to stick to the general form I have already started using if possible

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

int main(){

FILE *fileEncrypt = fopen("C:\Users\User\Desktop\Project_2\encryptMessage.txt", "r");//This file will contain the encrypted message.

FILE *fileKey = fopen("C:\Users\User\Desktop\Project_2\key.txt", "r");//This file will contain the key.

    char Code, DecodedCode;

    int key;

                   do{

                     Code = fgetc(fileEncrypt);

                    if(Code != 10)

                    printf( "%c", Code - key);

                    else{fprintf(fileEncrypt, " ", 10);}

                    //Code Scrambler(takes the number inputed and shifts the ASCII values of the message accordingly.

                    }

                    while( Code != EOF);//This loop will continue to print from the text file until it reaches the end.

                    while( Code != EOF);//This loop will continue to print from the text file until it reaches the end.

                    fclose(fileKey);//this will close the file containing the key.

                    fclose(fileEncrypt);//this will close the file containing the encrypted message.

                    return 0;

  }

Explanation / Answer

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main(){
FILE *fileEncrypt = fopen("C:\Users\User\Desktop\Project_2\encryptMessage.txt", "r");//This file will contain the encrypted message.
FILE *fileKey = fopen("C:\Users\User\Desktop\Project_2\key.txt", "r");//This file will contain the key.
char Code, DecodedCode;
int key;
fscanf(fileKey,"%d",&key);
Code = fgetc(fileEncrypt);
do{
if(Code>=65 && Code<=90)
{
DecodedCode = Code-key;
if(DecodedCode<65)
DecodedCode = DecodedCode+26;
printf( "%c", DecodedCode);
}
else if(Code>=97 && Code<=122)
{
DecodedCode = Code-key;
if(DecodedCode<97)
DecodedCode = DecodedCode+26;
printf( "%c", DecodedCode);
}
else
printf("%c",Code);
//Code Scrambler(takes the number inputed and shifts the ASCII values of the message accordingly.
Code = fgetc(fileEncrypt);
}
while( Code != EOF);//This loop will continue to print from the text file until it reaches the end.
fclose(fileKey);//this will close the file containing the key.
fclose(fileEncrypt);//this will close the file containing the encrypted message.
return 0;
}

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