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

int main(int argc, char *argv[]){
int x = 19530;
int y;
FILE *buff;
buff = fopen("BUFF.txt","w+");

for(int i = 1; i <= 5; i++){
    fprintf(buff, "%d", x);
    rewind(buff);
    fscanf(buff, "%d", &y);
    printf("y =  %dn", y);
    y = y/5;
    fclose(fopen("BUFF.txt", "w+"));
    fprintf(buff, "%d", y);

    }

 return 0;
}