The cpp json library provides a class called "Value" that represents a JSON value. The isDouble function is a member function of this class that can be used to check if a JSON value is a double value or not. The function returns a Boolean value.
Code Example 1:
Json::Value myVal; //assigning a double value to the JSON value myVal = 23.45; //checking if the JSON value is a double value or not if(myVal.isDouble()) { cout << "The value is a double value" << endl; } else { cout << "The value is not a double value" << endl; }
In this example, we create a JSON Value object called "myVal" and assign a double value of 23.45 to it. We then use the isDouble function to check if the value is a double value or not.
Code Example 2:
#include #include
using namespace std;
int main() { //creating a JSON object Json::Value myObj; //assigning a double value to a JSON key myObj["age"] = 28.5; //checking if the value associated with the key is a double value or not if(myObj["age"].isDouble()) { cout << "The age value is a double value" << endl; } else { cout << "The age value is not a double value" << endl; } return 0; }
In this example, we create a JSON object called "myObj" and assign a double value of 28.5 to the key "age". We then use the isDouble function to check if the value associated with the "age" key is a double value or not.
Package Library:
The cpp json library is a standalone package and does not require any external package library.
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