updated .gitignore, added run_test_coverage for local builds

.gitignore

@@ -31,6 +31,10 @@
 *.out
 *.app
 
+*.gcov
+*.gcda
+*.gcno
+
 compandit
 companders_fulltest
 .aider*

run_test_coverage.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+#this shell script calls the code coverage testing program gcov (part of the gcc suite)
+#you can run each command on your own at the command line
+
+#fist clean all object files
+make clean
+
+#compile all the test program, link etc
+make test
+
+# run the example.out program ... with test coverage (see makefile for flags)
+./companders_fulltest
+
+# gcov is the gcc suite test coverage program.  We're interested in the coverage
+# the companders.c file.  
+gcov companders.c
+
+# now the code coverage is in this file:
+# companders.c.gcov  
+# which can be viewed in any text editor