testfile = fopen(basename & ".dat", "w")

io_a = 9*10*479
io_b = "world"

printf("%.0f, %s\n", io_a, io_b)
fprintf(testfile, "%.0f, %s\n", io_a, io_b)
sprintf(io_c, "%.0f, %s", io_a, io_b)
printf("Message should have been \"%s\"\n", io_c)
fprintf(testfile, "Message should have been \"%s\"\n", io_c)
print_time("Current day of the week is %A\n")
fprint_time(testfile, "Current day of the week is %A\n")
fclose(testfile)