void about(char *);

main()
{

pid_t child;
pid_t child1;
pid_t child2;
about(“Dad”);
printf(“Now .. Forking !!\n”);
child = fork();
child1 = fork();
child2 = fork();

if (child < 0) {
perror ("Unable to fork");
exit(1);
} else if (child == 0)
about ("son");
else if (child1 ==0)
about ("dad");
else if (child2 ==0)
about ("son");
exit(2);
}

void about(char * msg)
{
pid_t me;
pid_t oldone;

me = getpid();
oldone = getppid();

printf("[%s] Hi, my pid is %d and I come from %d.\n", msg, me, oldone);

}

#include
#include

void main()
{
int
clrscr();
printf(“these programe is develope by manas maity.BCA \n”);
pintf(“enter number which u want: “);
scanf(“%d”,&n);
for(i=1;i<=n;i++)
{
c=1;
for(j=0;j<=n-i;j++)
printf("%3c",32);

for(j=0;j<=i;j++)
{
printf("%6d",c);
c=c*(i-j)/(j*1)
}
printf("\n");
}
getch();
}

#include
#include
#include
void main()
{
int n,s=0,r,x=0;
clrscr();
printf(“these programe is develope by manas maity.BCA \n”)
printf(“\n enter number:”);
scanf(“%d”&n);
while(n!=0)
{
n=n%2;
s=s+r*pow(10,x);
n=n/2;
x++;
printf(“the number is : %d”,s);
}
getch();
}