First ideas

1 files changed, 3 insertions, 2 deletions

diff --git a/04_exercise/quicksort.c b/04_exercise/quicksort.c
index 88a47a2..f912f2b 100644
--- a/04_exercise/quicksort.c
+++ b/04_exercise/quicksort.c
@@ -3,6 +3,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
+#include <string.h>
 
 static size_t partition(int v[], size_t len);
 
@@ -87,9 +88,9 @@ int main(int argc, const char *argv[]) {
 	/* read the length of the list from the command line */
 	size_t list_len = 30000000;
 	if (argc >= 2) {
-		long arg = atol(argv[1]);
+		long arg = strtol(argv[1], (char **)&argv[strlen(argv[1])], 10);
 		if (arg > 0)
-			list_len = arg;
+			list_len = (size_t)arg;
 	}
 	
 	/* generate a list with random integers */