How to open a text file („daten.txt“) in the language C here in my Fedora 41 (Linux).

The new program shows the current time. The telephone number does not appear here.

#include <stdio.h>
#include <time.h>

int main(){

    FILE *fp;
    fp = fopen("daten.txt", "w");
    if (fp == NULL) {
        fprintf(stderr, "Datei konnte nicht erstellt werden. \n");
        return 1;
    }

    time_t rawtime;
    struct tm * timeinfo;

    time ( &rawtime );
    timeinfo = localtime ( &rawtime );

    char name[50]; 

    printf("Insert your name: ");
    scanf("%s", name);

    fprintf(fp, "\nHallo %s heute ist %s", name, asctime(timeinfo));
    fclose(fp);

    // printf( "\nHallo %s heute ist %s", name, asctime( timeinfo));
    return 0;
}