(C++) JSON: Miscellaneous Operations

Demonstrates a variety of JSON API methods. This example uses the following JSON document:

{
   "alphabet": "abcdefghijklmnopqrstuvwxyz",
   "sampleData" : {
           "pi": 3.14,
	   "apple": "juicy",
	   "hungry": true,
	   "withoutValue": null,
           "answer": 42
          
	}
}

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#include <CkJsonObject.h>

void ChilkatSample(void)
    {
    CkJsonObject json;
    json.put_EmitCompact(false);

    // Assume the file contains the data as shown above..
    bool success = json.LoadFile("qa_data/json/sample2.json");
    if (success != true) {
        std::cout << json.lastErrorText() << "\r\n";
        return;
    }

    // First navigate to the "sampleData" object:
    CkJsonObject *sampleData = json.ObjectOf("sampleData");

    // Demonstrate BoolAt and BoolOf
    std::cout << "hungry: " << sampleData->BoolOf("hungry") << "\r\n";
    std::cout << "hungry: " << sampleData->BoolAt(2) << "\r\n";

    // StringOf returns the value as a string regardless of it's actual type:
    std::cout << "pi: " << sampleData->stringOf("pi") << "\r\n";
    std::cout << "answer: " << sampleData->stringOf("answer") << "\r\n";
    std::cout << "withoutValue: " << sampleData->stringOf("withoutValue") << "\r\n";
    std::cout << "hungry: " << sampleData->stringOf("hungry") << "\r\n";

    // Demonstrate IsNullOf / IsNullAt
    std::cout << "withoutValue is null? " << sampleData->IsNullOf("withoutValue") << "\r\n";
    std::cout << "withoutValue is null? " << sampleData->IsNullAt(3) << "\r\n";
    std::cout << "apple is null? " << sampleData->IsNullOf("apple") << "\r\n";
    std::cout << "apple is null? " << sampleData->IsNullAt(1) << "\r\n";

    // IntOf
    std::cout << "answer: " << sampleData->IntOf("answer") << "\r\n";

    // SetNullAt, SetNullOf
    // Set "pi" to null
    success = sampleData->SetNullAt(0);
    // Set "answer" to null
    success = sampleData->SetNullOf("answer");

    // Show the changes:
    std::cout << json.emit() << "\r\n";

    // Restore pi and apple:
    success = sampleData->SetNumberAt(0,"3.14");
    success = sampleData->SetNumberOf("answer","42");

    // Show the changes:
    std::cout << json.emit() << "\r\n";

    // Add a null value named "afterApple" just after "apple"
    success = sampleData->AddNullAt(2,"afterApple");

    // Add a boolean value just after "pi"
    success = sampleData->AddBoolAt(1,"afterPi",false);

    delete sampleData;

    // Examine the changes..
    std::cout << json.emit() << "\r\n";
    }