mirror of https://github.com/nlohmann/json.git
37 lines
766 B
C++
37 lines
766 B
C++
#include <iostream>
|
|
#include <nlohmann/json.hpp>
|
|
|
|
using json = nlohmann::json;
|
|
|
|
int main()
|
|
{
|
|
// create JSON array
|
|
const json array = {"first", "2nd", "third", "fourth"};
|
|
|
|
// output element at index 2 (third element)
|
|
std::cout << array.at(2) << '\n';
|
|
|
|
// exception type_error.304
|
|
try
|
|
{
|
|
// use at() on a non-array type
|
|
const json str = "I am a string";
|
|
std::cout << str.at(0) << '\n';
|
|
}
|
|
catch (const json::type_error& e)
|
|
{
|
|
std::cout << e.what() << '\n';
|
|
}
|
|
|
|
// exception out_of_range.401
|
|
try
|
|
{
|
|
// try to read beyond the array limit
|
|
std::cout << array.at(5) << '\n';
|
|
}
|
|
catch (const json::out_of_range& e)
|
|
{
|
|
std::cout << e.what() << '\n';
|
|
}
|
|
}
|