.

bac2/os/chap1/ex3.c

@@ -0,0 +1,38 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <unistd.h>
+
+int counter=1;
+
+void handler(int sig){
+	if(sig == SIGINT){
+		printf("Early ending. the current ammount of application is : %d\n", counter);
+		exit(0);
+	}
+}
+
+int collatz(int n){
+	sleep(1);
+	if (n % 2 == 0)
+		return n / 2;
+	return 3 * n  + 1;
+}
+
+int main(int argc, char *argv[])
+{	
+	signal(SIGINT, handler);
+	if (argc != 2)
+		exit(1);
+	int test = atoi(argv[1]);
+	printf("%d\n", test);
+	while(test != 1){
+		counter++;
+		test = collatz(test);
+		printf("%d\n", test);
+	}
+	printf("---\n%d\n", counter);
+	return 0;
+}
+