#include <stdio.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <pthread.h>
#include <sys/types.h>
#include <math.h>
#include <time.h>
void function1(void);
void function2(void);
main() {
struct timeval before,after,diff;
pthread_t thread1 , thread2;
gettimeofday(&before, 0);
pthread_create(&thread1,NULL,(void *)function1,NULL);
pthread_create(&thread2,NULL,(void *)function2,NULL);
pthread_join(thread1,NULL);
pthread_join(thread2,NULL);
gettimeofday(&after, 0);
timersub(&after, &before, &diff);
printf("program took %d:%d seconds\n", diff.tv_sec, diff.tv_usec);
exit(0);
}
void function1(void)
{
int i=2,n,k,s,f,z1;
do{
int z=1,n=2;
k=sqrt(i);
do{
s=fmod(i,n);
/* printf("s is %d\t%d\t",s,i); */
if(s==0){
f=0;
}
else f=1;
z= f&&z;
n=n++;
}while(n<=k);
if(z==1){
z1=i;
}
i=i++;
}while(i<50000);
printf("this is greatest prime1 %d\n",z1);
}
void function2(void)
{
int i,n,k,s,f,z2;
for(i=2;i<50000;i++)
{
int z=1;
k=sqrt(i);
for(n=2;n<=k;n++)
{
s=fmod(i,n);
if(s==0){
f=0;
}
else f=1;
z= f&&z;
}
if(z==1){
z2=i;
}
}
printf("this is greatest prime2 %d\n",z2);
}
