diff --git a/src/yes.c b/src/yes.c
new file mode 100644
index 0000000..992c78b
--- /dev/null
+++ b/src/yes.c
@@ -0,0 +1,19 @@
+#include <stdio.h>
+#include <string.h>
+
+int
+main(int argc, char *argv[])
+{
+  char a = 'y';
+
+  if(argv[1] != NULL)
+    {
+      strcpy(&a,argv[1]);
+    }
+  while(1)
+    {
+      putchar(a);
+      putchar('\n');
+    }
+  return 0;
+}