53 lines
999 B
C
Executable File
53 lines
999 B
C
Executable File
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <wait.h>
|
|
#include <errno.h>
|
|
|
|
void
|
|
str_to_ll(char *str, long long *num)
|
|
{
|
|
errno = 0;
|
|
char *endptr;
|
|
*num = strtoll(str, &endptr, 10);
|
|
|
|
if (*endptr || errno || endptr == str) {
|
|
fprintf(stderr, "Invalid number: %s\n", str);
|
|
exit(1); // TODO: по-хорошему заменить на внешний обработчик ошибок
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
for (int i = 0; i < 3; ++i) {
|
|
pid_t pid = fork();
|
|
|
|
if (pid == -1) {
|
|
return 1;
|
|
}
|
|
if (pid == 0) {
|
|
char buf[8] = {0};
|
|
read(0, buf, 7);
|
|
|
|
// long long t;
|
|
// str_to_ll(buf, &t);
|
|
|
|
int t = (int) strtol(buf, NULL, 10);
|
|
|
|
printf("%d\n", t * t);
|
|
return 0;
|
|
} else {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
while (wait(NULL) != -1)
|
|
;
|
|
|
|
return 0;
|
|
}
|