add testcase for #67
diff --git a/demo/demo.c b/demo/demo.c
index 7136a4c..4e59002 100644
--- a/demo/demo.c
+++ b/demo/demo.c
@@ -229,6 +229,15 @@ int main(void)
return EXIT_FAILURE;
}
+ mp_set_int(&a, 42);
+ mp_set_int(&b, 1);
+ mp_neg(&b, &b);
+ mp_set_int(&c, 1);
+ mp_exptmod(&a, &b, &c, &d);
+
+ mp_set_int(&c, 7);
+ mp_exptmod(&a, &b, &c, &d);
+
mp_set_int(&a, 0);
mp_set_int(&b, 1);