examples: more tests

[Akim Demaille]

commit 26fba6fc94ff252ce79d478437cb0e60d3544a30
Author: Akim Demaille <address@hidden>
Date:   Sat Jan 25 19:40:19 2020 +0100

    examples: more tests
    
    * examples/c/mfcalc/mfcalc.test: here.

diff --git a/examples/c/mfcalc/mfcalc.test b/examples/c/mfcalc/mfcalc.test
index 0d7b06a4..2e759ee5 100755
--- a/examples/c/mfcalc/mfcalc.test
+++ b/examples/c/mfcalc/mfcalc.test
@@ -25,3 +25,15 @@ cat >input <<EOF
 EOF
 run 0 9
 run -noerr 0 9 -p
+
+cat >input <<EOF
+a = 256
+sqrt (a)
+EOF
+run 0 '256
+16'
+
+cat >input <<EOF
+16 == 12
+EOF
+run 0 'err: syntax error'