windows下编译json-c-0.12版源码，　采用vc 2012 包括两个工程，　json-c-0.12　lib test 用例 具体使用可以参看源码目录下的testsrc(Windows compiled json-c-0.12 version of the source code, using VC 2012 includes two projects, json-c-0.12 lib test case specific u