将下列c语言程序改写为用中断方式控制51单片机数码管秒表0~59循环：#include <REG51.H> sbit sa=P2^2; sbit sb=P2^3; sbit sc=P2^4; unsigned char second=0; void delay5ms() { TH0=(65536-5000)/256; TL0=(65536-5000)%256; TR0=1; while(!TF0); TF0=0; } void sin(unsigned char i) { unsigned char led []={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; sa=1,sb=0,sc=0; P0=led[i/10]; delay5ms(); P0=0x00; sa=0;sb=0;sc=0; P0=led[i%10]; delay5ms(); P0=0x00; } void main() { unsigned int i; TMOD=0x00; TH0=(65536-5000)/256; TL0=(65536-5000)%256; TR0=1; while(1) { for(i=0;i<100;i++) { sin(second); } second++; if(second==60) second=0; } }

以下是使用中断方式控制51单片机数码管秒表0~59循环的程序：

#include <reg51.h>

sbit sa = P2^2;
sbit sb = P2^3;
sbit sc = P2^4;

unsigned char second = 0;

void delay5ms() {
    TH0 = (65536 - 5000) / 256;
    TL0 = (65536 - 5000) % 256;
    TR0 = 1;
    while (!TF0);
    TF0 = 0;
}

void sin(unsigned char i) {
    unsigned char led[] = {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f};
    sa = 1, sb = 0, sc = 0;
    P0 = led[i / 10];
    delay5ms();
    P0 = 0x00;
    sa = 0; sb = 0; sc = 0;
    P0 = led[i % 10];
    delay5ms();
    P0 = 0x00;
}

void timer0_isr() interrupt 1 {
    TH0 = (65536 - 5000) / 256;
    TL0 = (65536 - 5000) % 256;
    sin(second);
    second++;
    if (second == 60) {
        second = 0;
    }
}

void main() {
    TMOD = 0x01;
    TH0 = (65536 - 5000) / 256;
    TL0 = (65536 - 5000) % 256;
    TR0 = 1;
    ET0 = 1;
    EA = 1;
    while (1);
}

这个程序使用了定时器0中断来控制数码管的显示，实现了秒表的循环计时功能。在主函数中设置了定时器0的工作模式为模式1，开启了定时器0中断，并开启总中断开关。在定时器0中断服务程序中，每次定时器0中断时更新定时器0的计数值，然后调用sin函数显示秒表时间，并更新秒表时间。注意，由于使用了中断方式，所以程序中没有while(1)循环。