help with fopen() and strings. i'm a noob.

i'm coding a game program for my c class and i need some help.

okay, at the beginning of the game it reads the high scores from a .txt file and prints it to the screen. the standard file is called scores.txt, so it would look kind of like this:

inp = fopen("scores.txt", "r");

fscanf(inp, "%d%d%d%d", &score1, &score2, &score3, &score4);

printf("Best Scores\t%d\t%d\t%d\t%d", score1, score2, score3, score4);

fclose(inp);

but i am supposed to give the option of changing the score file. I was thinking of doing this with strings, for example:

inp = fopen("string_name.txt", "r");

i tried doing someting like:

char string_name[] = "scores";
inp = fopen("%s.txt", string_name "r");

and then another function to redefine string_name[] with whatever filename the user chooses, but it says theirs too many arguments or something.

Is there a way to use strings as the filename in fopen()? or is there another simple way i can achieve this?

thank you.

Code:

char filename[SIZE];
/*...*/
FILE *fp = fopen(filename, "rt");

[edit]

Code:

/* first10lines */
#include <stdio.h>
#include <string.h>

int main(void) {
    FILE *fp;
    char fn[100], line[80];
    int x;

    printf("\nEnter a file to view: ");
    fgets(fn, sizeof(fn), stdin);

    if(fn[strlen(fn)-1] == '\n') fn[strlen(fn)-1] = 0;

    if((fp=fopen(fn, "rt")) == NULL) {
        printf("Can't open that file\n");
        return 1;
    }

    for(x = 0; x < 10 && fgets(line, sizeof(line), fp); x ++) {
        printf("%s", line);
    }

    fclose(fp);

    return 0;
}

[/edit]

got it, thanks alot for your help!

Code:

if(fn[strlen(fn)-1] == '\n') fn[strlen(fn)-1] = 0;

No need to traverse the string twice; other variations that don't work fine.