51汇编编程，实现四位数码管，在中断控制下，从0~9999循环计数-51 assembler programming, the realization of the four digital tube, under the interrupt control, cycle count from 0 to 9999

Also called Q-formatFractional representation suitable for DSP algorithms.Fractional number range is between 1 and -1 Multiplying a fraction by a fraction always results in a fraction and will not produce an overflow (e.g., 0.99 x 0.9999 less than 1)