[英]JsonCpp: Undefined reference to `Json::Value::operator[](int) const'
我正在嘗試將JsonCpp與該示例代碼一起使用
string json_example = "{\"array\":[\"item1\", \"item2\"], \"not an array\":\"asdf\"}";
// Let's parse it
Json::Value root;
Json::Reader reader;
//Parsing of something. In example do parsing of json_example string.
bool parsedSuccess = reader.parse(json_example, root, false);
if (!parsedSuccess) {
// report to the user the failure and their locations in the document.
cout << "Failed to parse JSON" << endl << reader.getFormatedErrorMessages() << endl;
return 1;
}
// Let's extract the array that is contained inside the root object
const Json::Value array = root["array"];
// And print its values
for (int index = 0; index < array.size(); ++index) { // Iterates over the sequence elements.
cout << "Element " << index << " in array: " << array[index].asString() << endl;
}
// Lets extract the not array element contained in the root object and print its value
cout << "Not an array: " << root["not an array"] << endl;
// If we want to print JSON is as easy as doing:
cout << "Json Example pretty print: " << endl << root.toStyledString() << endl;
return 0;
但我在此“ ..array [index] .asString ...”上收到此錯誤
Undefined reference to `Json::Value::operator[](int) const'
有人可以幫我嗎?
Tnx為您解答...所以解決方案正在改變這一點
for (int index = 0; index < array.size(); ++index) { // Iterates over the sequence elements.
cout << "Element " << index << " in array: " << array[index].asString() << endl;
}
同
for (unsigned int index = 0; index < array.size(); ++index) { // Iterates over the sequence elements.
cout << "Element " << index << " in array: " << array[index].asString() << endl;
}
再見
我認為您沒有包括描述您的json.h庫文件的jsoncpp.cpp文件。 您必須使用Pythot使用命令python amalgamate.py
生成它,然后將其包含到您的項目中
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