#include<stdio.h>
#include<time.h>
#include<pthread.h>
#include<stdlib.h>
#include<sys/types.h> /* need to calculate which I will implement later */
void *fibr(void *n);
void *fibr_1(void *k);
signed long long int fibonacci(signed long long int);
int main(){
clock_t begin, end;
double time_spent;
pthread_t tid,tid1;
int result,result1;
signed long long int n=6;
signed long long int m=7;
result=pthread_create(&tid,NULL,fibr,&n);
if(result){
perror("pthread_create");
return 1;
}
result1=pthread_create(&tid1,NULL,fibr,&m);
if(result1){
perror("pthread_create");
return 1;
}
if(pthread_join(tid,NULL)){
perror("pthread_join");
return 1;
}
if(pthread_join(tid1,NULL)){
perror("pthread_join");
return 1;
}
printf("Fib value=%lld\n",n+m);
pthread_exit(NULL);
}
void *fibr(void *n){
signed long long int *y=n;
signed long long int x=*y;
pthread_t tid2,tid3;
signed long long int i,j;
/* How do I assign values to i , j in order to
achieve the level viz fib(n-2)....fib(n-4) */
if(pthread_create(&tid2,NULL,fibr_1,&i))
{
perror("pthread_create");
}
if(pthread_create(&tid3,NULL,fibr_1,&j))
{
perror("pthread_create");
}
if(pthread_join(tid2,NULL))
{
perror("pthread_join");
}
if(pthread_join(tid3,NULL))
{
perror("pthread_join");
}
/* How to return the values of i, j combined with *y . if I do *y+i+j, the result
is not coming correctly */
*y=fibonacci(x);
return NULL;
}
void *fibr_1(void *k){
long long int *a=k;
long long int b=*a;
*a=fibonacci(b);
return NULL;
}
signed long long int fibonacci(signed long long int x){
if((x==0)(x==1))
return x;
return fibonacci(x-1)+fibonacci(x-2);
}
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