Problem while reading a json file

[MdAnayat]

First of all thanks for this nice library.

I have the json in below format:
{
"values": "false",
"tran_up_left_scene_x": "1",
"CRC": "145"
}

I have saved it as input.json file and want to read it using the below code:
int x;
int y;
std::ifstream ifs("C:/codes/input.json");
json j = json::parse(ifs);
for (const auto& element : j["tran_up_left_scene_x"])
{
std::cout << element << std::endl;
x = element;
}

But I am getting the below error:
Exception unhandled:
default:
JSON_THROW(type_error::create(302, "type must be number, but is " + std::string(j.type_name())));

The json validator is showing the above used json is valid.
Any kind of help to solve this problem will be highly appreciated.

[nlohmann]

You try to assign a string to a number. You need to make that conversion explicit, e.g. with std::to_string.

[MdAnayat]

For extracting every single parameter from a json file i was using the below code:
for (const auto& element : j["tran_up_left_scene_x"])
{
std::cout << element << std::endl;
x = element;
}
But using std::to_string how can i extract each parameter of the json file??
can you give a code example??

[nlohmann]

You need to do this:

x = std::to_string(element);

But this only works if element holds a string. You can check the type with:

if (element.is_string())
{
    x = std::to_string(element);
}

[MdAnayat]

As per your suggestion, i have modified the code as below:
int x;
int y;
std::ifstream ifs("C:/codes/input.json");
json j = json::parse(ifs);
for (const auto& element : j["CRC"])
{

	std::cout << element << std::endl;
	if (element.is_string())
	{
		x = std::to_string(element);
	}
}

But getting the below error:

Error C2668 'std::to_string': ambiguous call to overloaded function

I have also tried stringstream to convert the string into a number. But it does not work either.

[nlohmann]

Oh, std::to_string makes no sense here.

x = std::stoi(element.get_ref<std::string&>());

[MdAnayat]

The above-mentioned line throws the below error:
Error C2662 'ReferenceType nlohmann::basic_json<std::map,std::vector,std::string,bool,int64_t,uint64_t,double,std::allocator,nlohmann::adl_serializer,std::vector<uint8_t,std::allocator<_Ty>>>::get_refstd::string&,0(void)': cannot convert 'this' pointer from 'const nlohmann::basic_json<std::map,std::vector,std::string,bool,int64_t,uint64_t,double,std::allocator,nlohmann::adl_serializer,std::vector<uint8_t,std::allocator<_Ty>>>' to 'nlohmann::basic_json<std::map,std::vector,std::string,bool,int64_t,uint64_t,double,std::allocator,nlohmann::adl_serializer,std::vector<uint8_t,std::allocator<_Ty>>> &'

[nlohmann]

Then change it to

x = std::stoi(element.get_ref<const std::string&>());

[MdAnayat]

This worked for me. Thanx a lot for your kind help.
You can close this issue now.