Untitled

#include<stdio.h> 
#include<unistd.h>
main()
{
int i,pid; 
if(pid==-1)
{
perror("fork failed");
exit(0);
}
else if(pid==0)
{
printf("\n Child process starts");
for(i=0; i<5; i++)
{
printf("\n Child process %d is called",i);
}
printf("\n Child process ends");
}
else
{
printf("\n Parent process ends");
}
exit(0);
}












#include<stdio.h> 
#include<conio.h>
main()
{
int i,m,n,tot,s[20];
printf("Enter total memory size:");
scanf("%d",&tot);
printf("Enter no. of pages:"); 
scanf("%d",&n);
printf("Enter memory for OS:"); 
scanf("%d",&m);
for(i=0;i<n;i++)
{
printf("Enter size of page%d:",i+1); 
scanf("%d",&s[i]);
}
tot=tot-m; 
for(i=0;i<n;i++)
{
if(tot>=s[i])
{
printf("Allocate page %d\n",i+1);
tot=tot-s[i];
}
else
printf("process p%d is blocked\n",i+1);
}
printf("External Fragmentation is=%d",tot); 
getch();
}