Added travis (#2)

* init first

* init project

* test failed

* fixed build error

* add travis

* update version

* fixed travis build

* fixed build

* fixed travis

* fixed build

Author: realDuYuanChao

.travis.yml

@@ -0,0 +1,9 @@
+language: c
+script:
+  - cmake -B ./build -S .
+  - cmake --build .
+
+notifications:
+  webhooks: https://www.travisbuddy.com/
+  on_success: never
+  on_failure: always

CMakeLists.txt

@@ -1,4 +1,5 @@
-cmake_minimum_required(VERSION 3.15.4)
+cmake_minimum_required(VERSION 3.12.4)
+
 project(Examples C)
 
 set(CMAKE_C_STANDARD 99)

README.md

@@ -1,2 +1,8 @@
-# C
-All Examples for learning C programming.
+# C Programming Examples
+
+[![Gitpod Ready-to-Code](https://img.shields.io/badge/Gitpod-Ready--to--Code-blue?logo=gitpod)](https://gitpod.io/#https://github.com/examplehub/C)
+[![Build Status](https://img.shields.io/travis/examplehub/C.svg?label=Travis%20CI&logo=travis&style=flat-square)](https://travis-ci.com/examplehub/C) 
+[![LGTM](https://img.shields.io/lgtm/alerts/github/examplehub/C.svg?label=LGTM&logo=LGTM&style=flat-square)](https://lgtm.com/projects/g/examplehub/C/alerts) 
+[![contributions welcome](https://img.shields.io/static/v1.svg?label=Contributions&message=Welcome&color=0059b3&style=flat-square)](https://github.com/examplehub/C/blob/master/CONTRIBUTING.md) 
+[![Donate](https://img.shields.io/badge/Donate-PayPal-green.svg?logo=paypal&style=flat-square)](https://paypal.me/duyuanchao?locale.x=en_US) 
+![](https://img.shields.io/github/repo-size/examplehub/C.svg?label=Repo%20size&style=flat-square)