60 lines
1.1 KiB
C
60 lines
1.1 KiB
C
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#include<unistd.h>
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#include<stdio.h>
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#include<stdlib.h>
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#include<signal.h>
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#include<stdint.h>
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#include<assert.h>
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#include "helpers.h"
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#include "helpers.c"
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uint64_t shots = 0,
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shots_in = 0;
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double pi = 0, t1;
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void int_handler(int){
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alarm(0);
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char c;
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printf("Le programme tourne depuis %f secondes, voulez-vous vraiment l'arrêter ? (O)ui / (N)on", tstamp() - t1);
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c = getchar();
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if (c == 'O' || c == 'o' || c == 'Y' || c == 'y'){
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exit(0);
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}
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else{
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return;
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alarm(5);
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}
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}
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void alarm_handler(int){
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printf("Valeur de pi en cours = %f\n", pi);
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printf("Nombre de tirs effectués = %f\n", (double) shots);
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alarm(5);
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}
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void quit_handler(int){
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alarm(0);
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shots = 0;
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shots_in = 0;
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t1 = tstamp();
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alarm(5);
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}
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int main(int argc,char * argv[])
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{
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double x,y;
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t1 = tstamp();
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alarm(5);
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set_signal_handler(SIGALRM, &alarm_handler);
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set_signal_handler(SIGINT, &int_handler);
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set_signal_handler(SIGQUIT, &quit_handler);
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while(1){
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x = ((double)rand())/(double)RAND_MAX;
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y = ((double)rand())/(double)RAND_MAX;
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shots ++;
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if ((x*x+y*y) <= 1)
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shots_in ++;
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pi = shots_in * 1.0 / shots * 4;
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}
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}
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