Seven segment

void display7segment(){
uint8_t i;uint32_t R;
uint8_t S;
R=harga; 
for(i=0;i<6;i++){
S=R%10;
if(R!=0||i==0)display7(S,i);
R=R/10;
}
R=volume/10;
for(i=6;i<11;i++){
S=R%10;
if(R!=0||i<9)display7(S,i);
R=R/10;
}
R=harga_perliter;
for(i=11;i<16;i++){
S=R%10; 
if(R!=0||i==11)display7(S,i);
R=R/10;
}
display7(15,10);
}
void display7(uint8_t nilai,uint8_t pos){
PORTB=0x00;
PORTB=nilai|pos<<4;
delay_us(1500);
}