Run a C program?

[bigminiboss]

ok try this:

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

#define MAX_USERNAME_LENGTH 100

int main() {
    char username[MAX_USERNAME_LENGTH];
    char color[10];
    FILE *fp;

    printf("Welcome to OyoSoft Setup!\n");
    sleep(1);

    printf("Please enter a username: ");
    scanf("%s", username);

    fp = fopen("././home.u/sys/usrnme.txt", "w");
    if (fp == NULL) {
        printf("Error opening file.\n");
        exit(1);
    }
    fprintf(fp, "%s", username);
    fclose(fp);

    printf("Please choose a color theme (white, blue, green, red): ");
    scanf("%s", color);

    fp = fopen("././home.u/sys/color.txt", "w");
    if (fp == NULL) {
        printf("Error opening file.\n");
        exit(1);
    }
    fprintf(fp, "%s", color);
    fclose(fp);

    printf("Setup complete!\n");

    return 0;
}

basically, you need a function called main XD. You can pair it with this in shell:

cd home.u/user
cc setup.c -o output
chmod +x setup.c
./output
rm -rf output

[OSoft]

I appreciate your help, and it did work, but now in my code, when I enter a username, it says error opening file, which means it can’t open the directory or the file. Is this a programming error or a permission issue?

[OSoft]

Oh and yes. This is what I meant. I know that I needed a function called main. But it is needed by main.c, so when I try to run the program, I now get this error, which happened before.

[bigminiboss]

oh sorry then I don’t know what to do XD BTW if you ever want to use that code again, use freopen instead and just use printf with it

[OSoft]

Thank you for trying to help regardless