parent lock part 1

#include <stdio.h>
#include <time.h>
#include <string.h>
#define SUBOR "date.txt"

int main(){
    time_t t = time(NULL);
    struct tm tm = *localtime(&t);
    int actDate, fileDate;
    FILE *f;
    actDate = tm.tm_mday;
    f = fopen(SUBOR, "r");
    fscanf(f, "%d", &fileDate);
    fclose(f);
    if (fileDate==actDate)
        return 0;
    else{
        f = fopen(SUBOR, "w");
        fprintf(f, "%d", actDate);
        fclose(f);
        if (tm.tm_wday == 0 || tm.tm_wday == 6)
            return 1;
        else
            return 2;
    }
}