--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/fact-a.c	Thu Jan 13 02:41:41 2000 +0900
@@ -0,0 +1,30 @@
+#include "stdio.h"
+
+int main( int ac, char *av[])
+{
+    int n;
+    n = atoi(av[1]);
+    goto factorial(n,1,n,print,return,environment);
+}
+
+code print(int n,int result,int orig,code(*print)(),(*exit1)(),void*exit1env)
+{
+    printf("%d! = %d\n",n, result);
+    goto (*exit1)(1),exit1env;
+}
+
+code factorial(int n,int result,int orig,code(*print)(),code(*exit1)(),
+    void *exit1env)
+{
+    if (n<0) {
+	printf("err %d!\n",n);
+	goto (*exit1)(0),exit1env;
+    }
+    if (n==0)
+	goto (*print)(n,result,orig,print,exit1,exit1env);
+    else {
+	result *= n;
+	n--;
+	goto factorial(n,result,orig,print,exit1,exit1env);
+    }
+}