CODEWITHSUNDEEP
c
Martin Šimara
Martin Šimara

Reputation: 11

Custom FILE name in C

I wanna ask you, if is it possible to have user inputed name of FILE*... something like this: 

#include <stdio.h>

int main() {
    char* name1, name2, path1, path2;
    printf("Insert first file name and path\nExample: file, c:\\path\\to\\file.txt");
    scanf("%s, %s", name1, path1);
    printf("Insert second file name and path\nExample: file, c:\\path\\to\\file.txt");
    scanf("%s, %s", name2, path2);
    FILE* name1;
    FILE* name2;
    name1 = fopen(path1, "a+");
    name2 = fopen(path2, "a+");
    ...
}

So on the console will be:

Insert file name and path
Example: file, c:\path\to\file.txt

so if user inserts:

File1, c:\file1.txt
File2, c:\file2.txt

I would like the "code" to look something like this:

FILE* File1;
File1 = fopen("c:\file1.txt", "a+");

FILE* File2;
File2 = fopen("c:\file2.txt", "a+");

Thanks for help ;)

Upvotes: 0

Views: 1957

Answers (2)

SHR
SHR

Reputation: 8313

You have problem with all strings:

char* name1, name2, path1, path2;

name1 is uninitialized pointer, name2, path1 and path2 are single characters variables.

I guess it should be something like this:

#define MAX_NAME 40
#define MAX_PATH 255 
char name1[MAX_NAME], name2[MAX_NAME], path1[MAX_PATH], path2[MAX_PATH];

Another issue: 

FILE* name1;
FILE* name2;

name1 and name2 are declared in the same scope, so I guess you get an "Already defined" error.

So, if you want to attached name and path to a FILE*, the best way to do so is to use a struct as follows:

typedef struct File_t
{
  char name[MAX_NAME];
  char path[MAX_PATH];
  FILE* file;
};

File_t file1, file2;
scanf("%s, %s", file1.name, file1.path);
file1.file = fopen(file1.path, "a+");

scanf("%s, %s", file2.name, file2.path);
file2.file = fopen(file2.path, "a+");

Upvotes: 1

Barmar
Barmar

Reputation: 780879

Escape sequences aren't processed in data that's read from a stream, so the user should type c:\file.txt, not c:\\file.txt.

Upvotes: 4

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