FMOD Result not being recognized as a valid type?

I have following block of code copied almost verbatim out of the fmod tutorials, with a minor modification of variable names so as not to conflict with anything. My code compiles fine without any of the fmod statements. When I put the FMOD_RESULT fm_result line and all that follows I get an error stating error C4430:开发者_StackOverflow中文版 missing type specifier - int assumed. Note: C++ does not support default-int I have VS2010, there are no linker or include file errors without the fmod code. The error is regarding the line fm_result = FMOD::System_Create(&fm_system); I also get the error error C2371: 'fm_result' : redefinition; different basic types on the same line.

FMOD_RESULT fm_result;
FMOD::System *fm_system;
fm_result = FMOD::System_Create(&fm_system);        // Create the main system object.

if(fm_result != FMOD_OK){
    printf("FMOD error! (%d) %s\n", fm_result, FMOD_ErrorString(fm_result));
    exit(-1);
}
fm_result = fm_system->init(100, FMOD_INIT_NORMAL, 0);  // Initialize FMOD.
if(fm_result != FMOD_OK){
    printf("FMOD error! (%d) %s\n", fm_result, FMOD_ErrorString(fm_result));
    exit(-1);
}

I don't know, it must be something about Visual Studio, or something else you're not telling us... The following compiles fine with me in GCC 4.6:

#include <fmod.hpp>
#include <fmod_errors.h>
#include <cstdio>
#include <cstdlib>

int main()
{
  FMOD_RESULT fm_result;
  FMOD::System *fm_system;
  fm_result = FMOD::System_Create(&fm_system);        // Create the main system object.

  if(fm_result != FMOD_OK)
  {
    printf("FMOD error! (%d) %s\n", fm_result, FMOD_ErrorString(fm_result));
    exit(-1);
  }

  fm_result = fm_system->init(100, FMOD_INIT_NORMAL, 0);  // Initialize FMOD.

  if(fm_result != FMOD_OK)
  {
    printf("FMOD error! (%d) %s\n", fm_result, FMOD_ErrorString(fm_result));
    exit(-1);
  }
}

I extracted fmodapi43405linux.tar.gz into /tmp/ and invoked the compiler like this:

g++ -W -Wall -Wextra -s -O3 -march=native -o prog prog.cpp \
    -I /tmp/fmodapi43405linux/api/inc/ \
    /tmp/fmodapi43405linux/api/lib/libfmodex.so

It also works if I append -std=c++0x.

Regarding the error: error C4430: missing type specifier - int assumed. Note: C++ does not support default-int

You would get this if you put FMOD_RESULT blah before your first include of FMOD. Can you make sure that is not the case? Perhaps you have an include chain that is using FMOD_RESULT before including fmod.h.