Bank Application using Petersons Algo.c

//Bank application using Peterson’s algorithm.
#include <stdio.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <stdlib.h>
#include <stdio.h>
typedef struct
{ 
	int turn ,flag[2],bal;
}shmpacket;

int main()
{	
	int shmid, damt,wamt,sleeptime,option,pid;
	shmpacket *ptr;
	shmid=shmget(200, sizeof (shmpacket), IPC_CREAT|0666);
	ptr=(shmpacket *) shmat(shmid,0,0);
	ptr->bal=5000;
	pid=fork();
	if (pid==0)
	  {
		  do
		   { ptr->flag[1]=1;
			 ptr->turn=0;
			 while ((ptr->turn==0) && (ptr->flag[0]==1));
			 printf("c: entering cs\n");
			 printf("c:enter the amount to withdraw\n");
			 wamt=rand()%1000;
			 printf(" c:withdraw amt= %d\n",wamt);
			 if (ptr->bal -wamt >=1000)
			  {   printf("c:withdraw amt= %d\n", wamt);
				  ptr->bal=ptr->bal-wamt;
				  printf("C: remaining balance = %d\n",ptr->bal);
			  }
			 else
			  { printf("c:withdraw not possible- minimum balance problem\n"); 
				  
				printf("C: current  balance = %d\n",ptr->bal);  
			  }	  
		 
			 ptr->flag[1]=0;
			 sleeptime=rand()%5;
			 sleep(sleeptime);
			 option=rand()%10;
			} while(option!=0); 	  
				  
		  exit(0);
	 }
  if (pid >0)	 	  		  
				  
	{
		  do
		   { ptr->flag[0]=1;
			 ptr->turn=1;
			 while ((ptr->turn==1) && (ptr->flag[1]==1));
			 printf("p: entering cs\n");
			 printf("p:enter the amount to deposit\n");
			 damt=rand()%1000;
			 printf(" P:deposit amt= %d\n",damt);
			
			 ptr->bal=ptr->bal+damt;
		     printf("P:  balance = %d\n",ptr->bal);
			   
			 ptr->flag[0]=0;
			 sleeptime=rand()%5;
			 sleep(sleeptime);
			 option=rand()%10;
			} while(option!=0); 	  
				  
		  exit(0);
	 }			  
				  
}