int main(int argc, char *argv[])
{
ACE_Process_Options options;
FILE *fp = 0;
char *n_env = 0;
int n;
if (argc == 1) {
n_env = ACE_OS::getenv("FACTORIAL");
n = n_env == 0 ? 10 : atoi(n_env);
options.command_line("%s %d", argv[0], n - 1);
const char *working_dir = ACE_OS::getenv("WORKING_DIR");
if (working_dir) options.working_directory(working_dir);
fp = fopen("factorial.log", "a");
cout << "before setenv" << endl;
options.setenv("PROGRAM=%s", ACE::basename(argv[0]));
cout << "after setenv" << endl;
} else {
fp = fopen("factorial.log", "a");
if (atoi(argv[1]) == 1) {
fprintf(fp, "[%s|%d]: base case\n",
ACE_OS::getenv("PROGRAM"), ACE_OS::getpid());
fclose(fp);
return 1;
} else {
n = atoi(argv[1]);
options.command_line("%s %d", argv[0], n - 1);
}
}
ACE_Process child;
child.spawn(options);
child.wait();
int factorial = n * child.return_value();
fprintf(fp, "[%s|%d]: %d! == %d\n",
ACE_OS::getenv("PROGRAM"), ACE_OS::getpid(),
n, factorial);
fclose(fp);
return factorial;
}
int main(int argc, char *argv[])
{
ACE_Process_Options options;
char *n_env = 0;
int n;
if (argc == 1) {
n_env = ACE_OS::getenv("FACTORIAL");
n = n_env == 0 ? 10 : atoi(n_env);
options.command_line("%s %d", argv[0], n - 1);
} else if (atoi(argv[1]) == 1) {
return 1;
} else {
n = atoi(argv[1]);
options.command_line("%s %d", argv[0], n - 1);
}
ACE_Process child;
child.spawn(options);
child.wait();
return n * child.return_value();
}