7 Segment

#include <reg52.h>
sbit str = P2^3;
sbit stp = P2^2;
code unsigned char led[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};
void delay(unsigned int z){
    unsigned int count,q;
    for(q=0;q<500;q++)
    for(count=0;count<z;count++);
}
void main(void){
    unsigned char j;
    P1=0xff;
    while(1){
        if((str==0)&&(stp==1)) delay(100);
        if((str==0)&&(stp==1)){
            while(1){
                for(j=0;j<8;j++){
                    P1=led[j];
                    delay(200);
                }
                if((str==1)&&(stp==0)) delay(100);
                if((str==1)&&(stp==0)){
                    P1=0xff;
                }
            }
        }
    }
}