Set random seed number at command line

diff --git a/convolve/horiz_filter.c b/convolve/horiz_filter.c
index 74144945ff24a788299960088d8916365b79b9b7..6b0986894ab0832610c12f11f90c1d5d45745b18 100644 (file)
--- a/convolve/horiz_filter.c
+++ b/convolve/horiz_filter.c
@@ -259,12 +259,14 @@ int main(int argc, char **argv)
 {
   const size_t block_size = 256;
 
-  if (argc != 2) {
-    printf("Usage: filtering <width>, where width = 4, 8, 16, 32, 64\n");
+  if (argc != 3) {
+    printf("Usage: filtering <width> <seed>\n");
+    printf("width = 4, 8, 16, 32, 64. seed = random seed number.\n");
     return -1;
   }
 
   const int width = atoi(argv[1]);
+  seed = atoi(argv[2]);
 
   uint8_t *buffer = (uint8_t *) malloc(2 * sizeof(buffer[0]) * block_size);
   uint8_t *pixel = (uint8_t *) malloc(2 * sizeof(pixel[0]) * block_size);