11 files changed, 9 insertions, 0 deletions

diff --git a/src/bash/isinteger.sh b/src/bash/isinteger.sh
new file mode 100755
index 0000000..deb2c74
--- /dev/null
+++ b/src/bash/isinteger.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+number="$1"
+
+if [ "$number" -eq "$number" ] 2>/dev/null; then
+    printf "'%s' valid integer.\n" "$number"
+else
+    printf "'%s' not valid integer.\n" "$number"
+fi
diff --git a/src/ctof b/src/c/ctof
index 7a47ff7..7a47ff7 100755
--- a/src/ctof
+++ b/src/c/ctof
diff --git a/src/ctof.c b/src/c/ctof.c
index e61cfcd..e61cfcd 100644
--- a/src/ctof.c
+++ b/src/c/ctof.c
diff --git a/src/dir b/src/c/dir
index 7757a29..7757a29 100755
--- a/src/dir
+++ b/src/c/dir
diff --git a/src/dir.c b/src/c/dir.c
index 05803fd..05803fd 100644
--- a/src/dir.c
+++ b/src/c/dir.c
diff --git a/src/main b/src/c/main
index 37336e8..37336e8 100755
--- a/src/main
+++ b/src/c/main
diff --git a/src/main.c b/src/c/main.c
index 30d5c61..30d5c61 100644
--- a/src/main.c
+++ b/src/c/main.c
diff --git a/src/main2 b/src/c/main2
index c35260e..c35260e 100755
--- a/src/main2
+++ b/src/c/main2
diff --git a/src/main2.c b/src/c/main2.c
index c63efdb..c63efdb 100644
--- a/src/main2.c
+++ b/src/c/main2.c
diff --git a/src/shift b/src/c/shift
index 6429b03..6429b03 100755
--- a/src/shift
+++ b/src/c/shift
diff --git a/src/shift.c b/src/c/shift.c
index c65b815..c65b815 100644
--- a/src/shift.c
+++ b/src/c/shift.c