C file creation problem

paniniter · 06-05-2004 6:29pm #1

Hi,
I'm trying to make a C program, but i'm having difficulty with a simple problem.
I want to tell the computer to make a file name that I type in using the file structure.
I can't do it, and i'm just wondering if it's even possible.

here's my attempt:

#include <stdio.h>

main(){
char strpr;
FILE *fp;
printf("Enter name:");
scanf("%s", &flnme);

fp=fopen("%s", flnme, "a");
fprintf(fp, "it works");
fclose(fp);
}

if anyone can help, that'd be great!

Silent Bob · 06-05-2004 7:07pm

What is strpr used for? Also where has flnme been declared?

What compiler and platform are you using? I haven't seen a fopen call that takes three arguments, an ANSI C implementation only takes two arguments.

Assuming that flnme is a character pointer you should be calling

FILE* fp = fopen(flnme, "a");

deadl0ck · 07-05-2004 3:57pm

Yep - you never declared flnme, also, your call to fopen was wrong.

This'll work for any input string smaller than 100 chars

[PHP]
#include <stdio.h>

#define MAX_INPUT_LEN 100

main()
{
FILE *fp = NULL;
char flnme[MAX_INPUT_LEN];

/* Init the flnme char array */
memset(flnme, 0, sizeof(char) * MAX_INPUT_LEN);

printf("Enter name:");
scanf("%s", &flnme);
fp = fopen(flnme, "a");
fprintf(fp, "it works");
fclose(fp);
}
[/PHP]

paniniter · 07-05-2004 4:05pm

Thanks for your help. I've got it working now.

C file creation problem

Comments