I need to write a program in C that decrypts a 12 character message in the file encrypted.txt however whenever I try to open this file it comes up as null. I'm confused, I've tried different methods, the only thing I can think of is I don't have the file, so I believe I need to create it in stdio.h, however I can't find where that is located either.
If someone could shed some light on my problem, I would appreciate it.
Thank you.
#include <stdio.h>
#include <stdlib.h>
int main()
{
FILE *fp;
if ((fp = fopen("encrypted.txt", "r")) ==NULL)
{
printf("Input file could not be opened\n");
exit(1);
}
return 0;
}