long long int with g++/MinGW

Hi,

I'm trying to use the "long long int" type, but I seem to be having some trouble. I'm using g++ (version 3.4.5, 2006, as far as I can tell), in MinGW, programming in the NetBeans 6.1 IDE. The trouble is that the compiler recognizes "long long int" (and its variations), but doesn't seem to be able to actually deal with them - arithmetic and printing show obvious errors. For example:

Code:

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#include <stdlib.h>
#include <stdio.h>
#include <limits.h>

int main(){
  printf("sizeof(long long): %d, Min: %lld, Max: %lld\n",
            sizeof(long long), LLONG_MIN, LLONG_MAX);
  return 0;
}

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My result is:

Code:

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sizeof(long long): 8, min: 0, max -2147483648

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Anybody have any idea what might be causing this? I needses my 8-byte integers, yes I does...

Thanks much in advance :)

You should use %I64d instead of %lld as MinGW uses MSVCRT. Keep in mind that with respect to the current C++ standard long long is a compiler extension. Also, you should use <cstdlib>, <cstdio> and <climits>, and note that printf is in the std namespace.

Also take note that you really should be using std::cout instead of printf. Is there a reason you use printf?
Or perhaps you posted in the wrong section (ie this is C code)?

Quote:

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Originally Posted by laserlight

You should use %I64d instead of %lld as MinGW uses MSVCRT. Keep in mind that with respect to the current C++ standard long long is a compiler extension. Also, you should use <cstdlib>, <cstdio> and <climits>, and note that printf is in the std namespace.

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Sadly gcc isn't strict about namespace std on C headers even with the C++ style inclusion. :(