Thread: reading from a text file into an array and coding.

hi everyone. im a little stuck on some homework and just wondering if anybody has any ideas on the best ways of going about this problem. basically i need to write a bit of code that will ask the user for the location of a text file to read in then ask the user for a number which will be a cipher key (eg if a = 1 b = 2 and the user enters 5 all the letters move 5 along so a would become e) it then needs to output the new encrypted file. i have managed to write a program to read in a text file and print it on screen but i was thinking of putting the users file into an array using fscanf. i will we using visual studio to do this. any help would be greatly apreciated.

thanks for your help. i havnt been able to go in to collage because of the snow but as soon as i get a chance il let you know how i get on

hello. yes i live in England. where are you? I have finally managed to get into university. the snow is almost gone now though.
I have a question as I have only recently began my programming course. I have written the first part of the code to read in a text document and show it on the screen. I would like to add another if statment so if the user enters a file destination that does not exist it comes up with an error message rather than crashing the program? could you help please.
her is what I have got so far:


#include <stdlib.h>
#include <stdio.h>
//a program that reads in a text file chosen by the user character by character and prints it out on the screen by Thomas collyer 01.12.10
void main ()//defines a program called main
{
FILE *file_in;//defines the stream as file in
char letter, destination[30]; //defines a string for each character and and array for the name of the text file
　
printf("please enter the file destination you want to read in\n");//gets the user to enter a file
scanf("%s" , destination);//reads in the destination and stores it in destination variable
file_in=fopen(destination, "r");// opens and reads the file
do//reads in the file and prints the file untill the end of file condition is met.
{

letter=getc(file_in);//reads each letter in one at a time to the letter variable
printf("%c" , letter);//prints each letter out on the screen
}
while

(letter != EOF);//checks if has reached the end of the text file
fclose(file_in);//closes the stream
}

sorry i forgot to put the code in a separate box. here it is again without the comments

[code]

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

void main ()
{
FILE *file_in;
char letter, destination[30];
　
printf("please enter the file destination you want to read in\n");
scanf("%s" , destination);
file_in=fopen(destination, "r");
do
{

letter=getc(file_in);
printf("%c" , letter);
}
while

(letter != EOF);
fclose(file_in);
}

I already answered this in your other thread! Don't ask the same question in multiple threads!