RDTSC on VisualStudio 2010 Express - C++ does not support default-int

Question

I tried to test rdtsc on VisualStudio 2010. Heres my code:

#include 
#include 
#include 
using          


        

Answer 1

To have this working you have to include cstdint :

#include <cstdint> // Or <stdint.h>

cstdint is the C++-style version of the C-style header stdint.h. Then it is better in your case to use the first one even if both are working in C++.

It is said here that those headers are shipped with visual studio since the 2010 version.

Answer 2

You have to #include <stdint.h>. Or (better) #include <cstdint>.

Visual Studio started shipping those headers with the 2010 version.

Answer 3

You have not included stdint.h/cstdint at the top apparently. This will work:

#include <iostream>
#include <windows.h>
#include <intrin.h>
#include <stdint.h>
using namespace std;

uint64_t rdtsc()
{
    return __rdtsc();
}

int main()
{
    cout << rdtsc() << "\n";
    cin.get();
    return 0;
}