請(qǐng)問C語(yǔ)言如何用兩個(gè)for來實(shí)現(xiàn)這段代碼呢？

ID:964313 · 發(fā)表于 2021-9-6 10:40

#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit dula=P2^6;
sbit wela=P2^7;
void delayms(uint);
uchar m,n;
uchar code duanma[]={0x3f,0x06,0x5b,0x4f,
                  0x66,0x6d,0x7d,0x07,
                        0x7f,0x6f,0x77,0x7c,
                        0x39,0x5e,0x79,0x71};
uchar code weima[]={0xfe,0xfd,0xfb,0xf7,
                  0xef,0xdf,0xbf,0x7f};


void main()
{

      while(1)


            {
               m=5;
            for(n=2;n<8;n++)

            {



                                          dula=1;
                                          P0=duanma[n];
                                          dula=0;
                        P0=0xff;





                                                      wela=1;
                        P0=weima[m];
                        wela=0;
                        delayms(1);
                              m--;
                                    if(m==6)
                                       m=0;


                                             }






            }

                                             }


/*-----------------*/

void delayms(uint xms)
{
uint i,j;
      for(i=xms;i>0;i--)
         for(j=110;j>0;j--);

}

ID:584814 · 發(fā)表于 2021-9-7 08:44

是這個(gè)意思？
#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit dula=P2^6;
sbit wela=P2^7;
uchar m,n;
uchar code duanma[]={0x3f,0x06,0x5b,0x4f,
                  0x66,0x6d,0x7d,0x07,
                        0x7f,0x6f,0x77,0x7c,
                        0x39,0x5e,0x79,0x71};
uchar code weima[]={0xfe,0xfd,0xfb,0xf7,
                  0xef,0xdf,0xbf,0x7f};

void main()
{
   uint i,j;
      while(1)

            {
               m=5;
            for(n=2;n<8;n++)

            {

                                          dula=1;
                                          P0=duanma[n];
                                          dula=0;
                        P0=0xff;

                                                      wela=1;
                        P0=weima[m];
                        wela=0;

      for(i=xms;i>0;i--)
         for(j=110;j>0;j--);

                              m--;
                                    if(m==6)
                                       m=0;

                                             }

            }

                                             }

ID:213173 · 發(fā)表于 2021-9-7 11:02

CPU是要不停地跑的，用兩個(gè)for循環(huán)就是叫CPU原地踏步來空熬時(shí)間，達(dá)到停頓的目的。以使數(shù)碼管輪流顯示一段時(shí)間，得到動(dòng)態(tài)顯示的效果。

ID:885138 · 發(fā)表于 2021-9-8 12:53

用for(;;){}代替while(1){}

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請(qǐng)問C語(yǔ)言如何用兩個(gè)for來實(shí)現(xiàn)這段代碼呢？