85 lines
1.5 KiB
C
85 lines
1.5 KiB
C
#include <unistd.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <signal.h>
|
|
#include <stdint.h>
|
|
#include <assert.h>
|
|
#include "helpers.h"
|
|
#include "helpers.c"
|
|
|
|
uint64_t shots = 0,
|
|
shots_in = 0;
|
|
|
|
double pi = 0,
|
|
t1;
|
|
|
|
sigset_t alset, intset, quitset;
|
|
|
|
void alarm_handler(int)
|
|
{
|
|
sigprocmask(SIG_BLOCK, &alset, NULL);
|
|
printf("pi = %f\n", pi);
|
|
printf("le nombre de tirs est de %f\n", (double)shots);
|
|
alarm(5);
|
|
sigprocmask(SIG_UNBLOCK, &alset, NULL);
|
|
}
|
|
|
|
void int_handler(int)
|
|
{
|
|
alarm(0);
|
|
|
|
sigprocmask(SIG_BLOCK, &intset, NULL);
|
|
|
|
char c;
|
|
printf("Voulez-vous quitter ? (y/n)\n");
|
|
c = getchar();
|
|
|
|
if (c == 'y' || c == 'Y')
|
|
{
|
|
printf("Le temps écoulé est de %f\n", tstamp() - t1);
|
|
exit(0);
|
|
}
|
|
return;
|
|
sigprocmask(SIG_UNBLOCK, &intset, NULL);
|
|
alarm(5);
|
|
}
|
|
|
|
void quit_handler(int)
|
|
{
|
|
alarm(0);
|
|
sigprocmask(SIG_BLOCK, &quitset, NULL);
|
|
shots = 0;
|
|
shots_in = 0;
|
|
t1 = tstamp();
|
|
sigprocmask(SIG_UNBLOCK, &quitset, NULL);
|
|
alarm(5);
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
double x, y;
|
|
t1 = tstamp();
|
|
alarm(5);
|
|
sigaddset(&alset, SIGINT);
|
|
sigaddset(&alset, SIGQUIT);
|
|
sigaddset(&intset, SIGALRM);
|
|
sigaddset(&intset, SIGQUIT);
|
|
sigaddset(&quitset, SIGALRM);
|
|
sigaddset(&quitset, SIGINT);
|
|
set_signal_handler(SIGALRM, &alarm_handler);
|
|
set_signal_handler(SIGINT, &int_handler);
|
|
set_signal_handler(SIGQUIT, &quit_handler);
|
|
|
|
while (1)
|
|
{
|
|
x = ((double)rand()) / (double)RAND_MAX;
|
|
y = ((double)rand()) / (double)RAND_MAX;
|
|
shots++;
|
|
|
|
if ((x * x + y * y) <= 1)
|
|
shots_in++;
|
|
|
|
pi = 4 * (double)(shots_in) / shots;
|
|
}
|
|
}
|