diff --git a/.gitignore b/.gitignore
index c6127b3..61e3e7b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -50,3 +50,7 @@ modules.order
 Module.symvers
 Mkfile.old
 dkms.conf
+
+# project specific for c-basic
+huffman/testfiles/*
+huffman/testfiles/
diff --git a/bin/scanf-test b/bin/scanf-test
new file mode 100755
index 0000000..f9a18f0
Binary files /dev/null and b/bin/scanf-test differ
diff --git a/compile-all.sh b/compile-all.sh
index 6cb2257..f831cf7 100755
--- a/compile-all.sh
+++ b/compile-all.sh
@@ -1,2 +1,3 @@
 #!/bin/bash
+echo "compiling all files in working directory $(pwd)"
 for file in $(/bin/ls); do ./compile.sh $file; done
diff --git a/compile-and-run.sh b/compile-and-run.sh
index 5e72a9b..a79cf6b 100755
--- a/compile-and-run.sh
+++ b/compile-and-run.sh
@@ -1,4 +1,4 @@
 #!/bin/bash
-name=$(echo "$1" | cut -f 1 -d '.')
+noext=$(echo "$1" | cut -f 1 -d '.')
 gcc $1 -o bin/$noext
 ./bin/$noext $2 $3 $4 $5 $6 $7 $8 $9
diff --git a/scanf-test.c b/scanf-test.c
index 07c5bf8..8a489b8 100644
--- a/scanf-test.c
+++ b/scanf-test.c
@@ -1,10 +1,11 @@
 #include <stdio.h>
 
 int main() {
-int a;
-float f;
-char s[20];
-scanf("%d %f %s", &a, &f, s);
-printf("%d %f %s\n", a, f, s);
-return 0;
-\n}
+    int a;
+    float f;
+    char s[20];
+    printf("input an integer, a float, then a string.\n");
+    scanf("%d %f %s", &a, &f, s);
+    printf("%d %f %s\n", a, f, s);
+    return 0;
+}