Electronic Voting Machine

#include<reg51.h>


void nominee(char[],int);

void lcd_cmd(char);
void lcd_init();
void lcd_data(char[]);
void delay(int);
void lcd_dataint(int);
void results();

sbit start=P1^0;
sbit n1=P1^1;
sbit n2=P1^2;
sbit n3=P1^3;
sbit rs=P2^0;
sbit oe=P2^1;
sbit again=P1^4;
sbit result=P1^5;

int nom[3]={0,0,0};
int overallC=0,permission=0;

     
  void main()
   {
     n1=n2=n3=start=1;
     oe=rs=0;
     P3=0x00;
     TMOD=0x01;

     lcd_init();
 
      while(1)
     {
      while(!start)
      {
        lcd_cmd(0x01);
        lcd_cmd(0x8a);
              lcd_data("welcome");
              lcd_cmd(0xc0);
              lcd_data("Please wait-");
  
            while(again==1 )
              {
                if (result==0) results();
              }
      permission=1;
 
        if(permission==1)
           {
           lcd_cmd(0x01);
           lcd_data("Now vote your nominee-");
           }
        
      while(permission==1)
          {
   
            if(n1==0)
            nominee("nominee1",0);
               if(n2==0)
            nominee("nominee2",1);
            if(n3==0)
            nominee("nominee3",2);
        }  
           }
        }
   }

void nominee(char name[],int value)
{
 
   nom[value]++;
   overallC++;
   lcd_cmd(0x01);
   lcd_data("you have voted for ");
   lcd_data(name);
   lcd_cmd(0xc0);
   lcd_data("your registered ID is-");
   lcd_dataint(overallC);
   delay(25);
   permission=0;

}

void results()
{
delay(24);
if(result==0)
{
 lcd_cmd(0x01);
 lcd_cmd(0x80);
 lcd_data("N1       N2       N3");
 lcd_cmd(0xc0);
 lcd_dataint(nom[0]);
 lcd_cmd(0xc7);
 lcd_dataint(nom[1]);
 lcd_cmd(0xcf);
 lcd_dataint(nom[2]);
 }
 while(again==1);
}




void lcd_dataint(int p)
{
  int a[5],i=0,j=0;
  if(p==1)
  P3=0x31;
  while((p/10)!=0)
  {
 a[i]=p%10;
 i++;
 p=p/10;
  }
  a[i]=p;
  i=4;
  while(i>=0)
  {
    rs=1;
    P3=48+a[i];
    oe=1;
    for(j=0;j<1000;j++);
    oe=0;
 i--;
  }
}

void lcd_cmd(char x)
{
  rs=0;
  P3=x;
  oe=1;       //creating a pulse
  delay(1);
  oe=0;
  
}

void lcd_init()
{
  lcd_cmd(0x38);
  lcd_cmd(0x01);
  lcd_cmd(0x06);
  lcd_cmd(0x0E);
}

void lcd_data(char x[])
{
  int i,j;
  
  for(i=0;x[i]!='\0';i++)
  {
  rs=1;
  P3=x[i];
  oe=1;
  for(j=0;j<5000;j++);
  oe=0;
  }
}

void delay(int n)
{
  int i=0;
  for(i=0;i<n;i++)
  {
    TR0=1;
 while(TF0!=1);
 TF0=0;
 TR0=0;
  }
}