int main(int argc, char *argv[])
{
pid_t process_id;
long int long_int;
char *end_ptr;
if(argc != 2)
{
printf("\nInvalid input.\nFormat is: a.out <sequence size>\n\n");
return -1;
}
long_int = strtol(argv[1],&end_ptr,10);
if((!((atoi(argv[1]) >= 0) && (atoi(argv[1]) <= (MAX_SEQUENCE - 1)))) || (end_ptr == argv[1]) || (*end_ptr != '\0'))
{
printf("\nPlease enter Fibonacci Sequence size between 0 - 9.\n\n");
return -1;
}
gfib_series.sequence_size = atoi(argv[1]);
process_id = fork();
if(process_id < 0)
{
/* Error during child process creation. */
fprintf(stderr, "Fork failed");
return -1;
}
else if(process_id == 0)
{
/* Child process */
computeFibonacci(&gfib_series);
printf("\nOutput from child process:");
printFibonacci(&gfib_series);
}
else
{
/* Parent process */
/* Wait for the child to complete. */
wait(NULL);
printf("\nOutput from parent process:");
printFibonacci(&gfib_series);
}
return 0;
}
void printFibonacci(int n)
{
static long int first=0,second=1,sum;
if(n>0)
{
sum = first + second;
first = second;
second = sum;
printf("%ld ",sum);
printFibonacci(n-1);
}
}
/* Número máximo de valores */
void printFibonacci(int max_index, int atual) {
if (atual <= max_index) {
if (atual == max_index)
printf("%d.\n", Fibonacci(atual));
else
printf("%d, ", Fibonacci(atual));
printFibonacci(max_index, atual + 1);
}
}
int main() {
int op, x;
printf("Pretende usar numero maximo de valores (1) ou valor maximo (2)? ");
scanf("%d", &op);
switch (op) {
case 1:
printf("Introduza um numero maximo de valores: ");
scanf("%d", &x);
printf("Sequencia: ");
printFibonacci(x - 1, 0); /*Até um máximo X valores da sequência, por outras palavras, F(0),...,F(x-1)*/
break;
case 2:
printf("Introduza o valor maximo: ");
scanf("%d", &x);
printf("Sequencia: ");
printFibonacci_val(x, 0);
break;
default:
printf("Não introduziu um valor válido.\n");
exit(0);
}
}
int main(int argc,char*argv[])
{
if( argc < 4 )
{
printf("Insufficient arguments.\n");
printf("Syntax:<filename> <No of elements to sort> <The range for fibonacci series> <No of iterations in the Buffon needle problem simulation>\n");
exit(0);
}
if(argc>4)
{
printf("Too many arguments\n");
printf("Syntax:<filename> <No of elements to sort> <The range for fibonacci series> <No of iterations in the Buffon needle problem simulation>\n");
exit(0);
}
m=atoi(argv[1]);
n=atoi(argv[2]);
r=atoi(argv[3]);
pid_t pid1,pid2,pid3,pid,k;
pid1=fork();
sleep(1);
if(pid1==0)//In the first child process
{
pid1=getpid();
printf("\nThe process id of first child process is:%d\n",pid1);
int i,arr[50],j;
printf("The generated random numbers are:\n");
srand(time(NULL));
for(i=0;i<m;i++)
{
arr[i]=rand()%100;
printf("%d\n",arr[i]);
}
heapsort(arr,m);
printf("\nThe Sorted Elements Are:\n");
for(i=0;i<m;i++)
printf("%d\t",arr[i]);
printf("\n");
exit(0);
}
else//In the parent process
{
pid2=fork();
sleep(1);
}
if(pid2==0)//In the second child process
{
pid2=getpid();
printf("\nThe process id of the second process is:%d\n",pid2);
long int i=0,j=1,f;
printf("The range is:%d\n",n);
printf("Fibonacci Series: \n");
printf("%d %d ",0,1);
printFibonacci(n);
printf("\n");
return 0;
exit(0);
}
else//In the parent process
{
pid3=fork();
sleep(1);
}
if(pid3==0)//In the third child process
{
pid3=getpid();
printf("\nThe process id of the third process is:%d\n",pid3);
int i,t=0;
printf("The number of iterations is:%d\n",r);
srand(time(NULL));
for(i=1;i<=r;i++)
{
//printf("Iteration:%d\n",i);
iterate(&t);
}
j=(float)t/r;
p=(2/M_PI)*(L/G);
printf("Exact probability is:%lf.\n",p);
printf("An approximation of the exact probability is:%lf.\n\n",j);
exit(0);
}
else//In the parent process
{
//printf("Waiting for child process 1 to terminate..\n");
pid1=waitpid(pid1,&s,WNOHANG);
if(WIFEXITED(s))
printf("The exit status of the first child process:%d",WEXITSTATUS(s));
sleep(1);
//printf("\nWaiting for child process 2 to terminate..\n");
pid2=waitpid(pid2,&s,WNOHANG);
if(WIFEXITED(s))
printf("\nThe exit status of the second child process:%d\n",WEXITSTATUS(s));
sleep(1);
//printf("\nWaiting for child process 3 to terminate..\n");
pid3=waitpid(pid3,&s,WNOHANG);
if(WIFEXITED(s))
printf("The exit status of the third child process:%d\n",WEXITSTATUS(s));
}
}
