mirror of
https://github.com/nlohmann/json.git
synced 2024-08-25 22:37:01 +02:00
504012a3db
As <iostream> is not included in json.hpp any more, all code examples need to include <iostream> now.
44 lines
874 B
C++
44 lines
874 B
C++
#include <iostream>
|
|
#include "json.hpp"
|
|
|
|
using json = nlohmann::json;
|
|
|
|
int main()
|
|
{
|
|
// create JSON array
|
|
json array = {"first", "2nd", "third", "fourth"};
|
|
|
|
// output element at index 2 (third element)
|
|
std::cout << array.at(2) << '\n';
|
|
|
|
// change element at index 1 (second element) to "second"
|
|
array.at(1) = "second";
|
|
|
|
// output changed array
|
|
std::cout << array << '\n';
|
|
|
|
|
|
// exception type_error.304
|
|
try
|
|
{
|
|
// use at() on a non-array type
|
|
json str = "I am a string";
|
|
str.at(0) = "Another string";
|
|
}
|
|
catch (json::type_error& e)
|
|
{
|
|
std::cout << e.what() << '\n';
|
|
}
|
|
|
|
// exception out_of_range.401
|
|
try
|
|
{
|
|
// try to write beyond the array limit
|
|
array.at(5) = "sixth";
|
|
}
|
|
catch (json::out_of_range& e)
|
|
{
|
|
std::cout << e.what() << '\n';
|
|
}
|
|
}
|