"a software development process that relies on the repetition of a very short development cycle: first the developer writes a failing automated test case that defines a desired improvement or new function, then produces code to pass that test and finally refactors the new code to acceptable standards".I've been hearing a lot about it since I started programming again. That aroused my curiosity and I'd like to learn how to use it.
$ mkdir /home/youruser/JsonCpp $ tar xzf /home/youruser/JsonCpp/jsoncpp-src-0.5.0.tar.gz
$ tar xzf /home/youruser/JsonCpp/jsoncpp-src-0.5.0/scons-local-1.3.0.tar.gz
$ cd /home/youruser/JsonCpp/jsoncpp-src-0.5.0 $ python scons.py platform=linux-gcc check
$ sudo cp /home/youruser/JsonCpp/jsoncpp-src-0.5.0/libs/linux-gcc-4.4.5/libjson_linux-gcc-4.4.5_libmt.so /usr/lib $ sudo mkdir /usr/include/jsoncpp $ sudo cp /home/youruser/JsonCpp/jsoncpp-src-0.5.0/include/json/* /usr/include/jsoncpp/
#include <cstdio>
#include <cstring>
// This is the JSON header
#include "jsoncpp/json.h"
using namespace std;
int main(int argc, char **argv)
{
string json_example = "{\"array\": \
[\"item1\", \
\"item2\"], \
\"not an array\": \
\"asdf\" \
}";
// Let's parse it
Json::Value root;
Json::Reader reader;
bool parsedSuccess = reader.parse(json_example,
root,
false);
if(not parsedSuccess)
{
// Report failures and their locations
// in the document.
cout<<"Failed to parse JSON"<<endl
<<reader.getFormatedErrorMessages()
<<endl;
return 1;
}
// Let's extract the array contained
// in the root object
const Json::Value array = root["array"];
// Iterate over sequence elements and
// print its values
for(unsigned int index=0; index<array.size();
++index)
{
cout<<"Element "
<<index
<<" in array: "
<<array[index].asString()
<<endl;
}
// Lets extract the not array element
// contained in the root object and
// print its value
const Json::Value notAnArray =
root["not an array"];
if(not notAnArray.isNull())
{
cout<<"Not an array: "
<<notAnArray.asString()
<<endl;
}
// If we want to print JSON is as easy as doing:
cout<<"Json Example pretty print: "
<<endl<<root.toStyledString()
<<endl;
return 0;
}
$ g++ -o test_json test_json.cpp -ljson_linux-gcc-4.4.5_libmt
$ ./test_json
Element 0 in array: item1
Element 1 in array: item2
Not an array: "asdf"
Json Example pretty print:
{
"array" : [ "item1", "item2" ],
"not an array" : "asdf"
}
Advanced C++ with examplesMy favourite posts so far have been a series about design patterns and their implementation in C++.
"As far as I know, no one offers a university degree in Agile software development. Since I'm an unschooler by nature, that's ok with me. I'm learning to write software, understand Agile principles, and connect those things to business. This website is for me to learn, and to process and record some of that learning.The structure of the blog is the following:
And maybe you can do some teaching and learning, too."