#include <stdio.h>
void main()
{
    FILE *fp;
    unsigned int map_id;
    char file_name[500];
    printf("Please input the ID of the map: \n");
    scanf("%d", &map_id);
    if (map_id > 999)
        map_id = 999;
    
    sprintf(file_name, "Map%03d.rxdata", map_id);
    printf("The file name is \"%s\".\n", file_name);
    fp = fopen(file_name, "ab");
    fwrite(&map_id, sizeof(map_id), 1, fp);
    fclose(fp);
    printf("File created and written.\n");
}            
                      

