syntax error

[superdaz83]

For some reason I'm getting the error "nullptr" undeclared identifier?

#include <iostream>


int main()
{

int a(20);
int* pnbr(nullptr);

std::cout << "the value of a = " << a <<std::endl;
std::cout << "the address of a = " << std::hex << &a <<std::endl;

pnbr=&a;

std::cout << "pnbr has the same address as (a) which is = " << std::hex << pnbr <<std::endl;

return 0;
}

am I missing something here? I'm following a tutorial and their program compiles I'm using the exact same code....

changing it to = 0 instead of (nullptr) works I'm just wondering why this code doesn't compile and his does...

[Easton]

"nullptr" only works with C++ 11, and when I compiled this with C++ 11, it worked, but did not with C++ 98. By default compilers use C++ 98, which calls for 0, rather than nullptr.

See:
http://www.cplusplus.com/reference/cstring/NULL/
https://en.wikipedia.org/wiki/C++11

[superdaz83]

Ah thanks for that info!