1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
int main(){
int pid ;
double i = 20.0;
double j = 19.0;
double k = 5.0;
double total = 0;
int t1[2];int t2[2];/*future tube */
pipe(t2);/* création des tubes*/
pipe(t1);
pid = fork();
if(pid == 0){/* ds le 1er fils*/
double value ;
close(t1[1]);
read(t1[0],&value,sizeof(double));
close(t1[0]);
total = value + 5;
printf("%f \n",total);
write(t2[1],&total,sizeof(total));
/*elle écrit dans le 2éme tube*/
close(t2[1]);
exit(0);
}
else{/* ds le pére */
write(t1[1],&i,sizeof(i));
pid = fork();
if(pid == 0){/*pére*/
printf("%f \n",total);
read(t1[0],&total,sizeof(double));
printf("%f \n",total);
}else{
double value ;
read(t2[0],&value,sizeof(double));
total = value * 2 ;
printf("%f \n",total);
write(t1[1],&total,sizeof(double));
}
}
} |
