add to string function to class Object and Array,let them can be convert...

[mobilefzb]

... to std::string object without tabs and newline.
so,the demo test.cc may have this output:{"bar":3,"baz":{"failure":true,"success":"no way"},"beer":[true,"asia","europa",55,3.120000,3.120000],"foo":true}
when you want to use json++ to get a data buf to send,it may be useful.^_^