51单片机一位数码管显示数字

#include <reg51.h>
void delay(unsigned int z) //??1ms????
{
        unsigned int x,y;
        for(x = z; x > 0; x--)
                for(y = 114; y > 0 ; y--);//500x114
}
void main()
{
P0 = 0x3F;
delay(1000);
P0 = 0x06;
delay(1000);
P0 = 0x5B;
delay(1000);
P0 = 0x04F;
delay(1000);
}

/*
0x3F,  //"0"
0x06,  //"1"
0x5B,  //"2"
0x4F,  //"3"
0x66,  //"4"
0x6D,  //"5"
0x7D,  //"6"
0x07,  //"7"
0x7F,  //"8"
0x6F,  //"9"
*/