clGetPlatformInfo 0xC0000005: Access violation

Hey guys, just starting with openCL, I am following a book called "OpenCL Parallel Programming Development Cookbook" to get started with OpenCL.

I am using Visual C++ (because thats all I have on me, I might try spin up a linux box later when I have some more time) on Visual Studio 2015, windows 10 64bit.

I just installed the latest drivers for both the intel and amd gpus and installed the latest intel openCL sdk.

so I get this error:
Unhandled exception at 0x5A423656 (OpenCL.dll) in TestOpenCLProject"T.exe: 0xC0000005: Access violation reading location 0xCCCCCCCC.
at this line:
 

	error = clGetPlatformInfo(id, param_name, 0, NULL, &paramSize);

When I Run this code

...

void displayPlatformInfo(cl_platform_id id, cl_platform_info param_name, const char* paramNameAsStr) {
	cl_int error = 0;
	size_t paramSize = 0;

	error = clGetPlatformInfo(id, param_name, 0, NULL, &paramSize);

	char* moreInfo = (char*)alloca(sizeof(char) * paramSize);
	error = clGetPlatformInfo(id, param_name, paramSize, moreInfo, NULL);
	if (error != CL_SUCCESS) {
		perror("Unable to find any OpenCl platform information");
		return;
	}
	printf("%s: %s\n", paramNameAsStr, moreInfo);
}

int main(void)
{
	/* OpenCL 1.2 data structures */
	cl_platform_id* platforms;
	/* OpenCl 1.1 scalar data types */
	cl_uint numOfPlatforms;
	cl_int error;
...
	error = clGetPlatformIDs(0, NULL, &numOfPlatforms);
	if (error < 0) {
		perror("Unable to find any OpenCl platofrms");
		exit(1);
	}
...
	platforms = (cl_platform_id*)alloca(sizeof(cl_platform_id) * numOfPlatforms);
	printf("Number of OpenCL platforms found: %d\n", numOfPlatforms);
...
	for (cl_uint i = 0; i < numOfPlatforms; ++i)
	{
		displayPlatformInfo(platforms[i], CL_PLATFORM_PROFILE, "CL_PLATFORM_PROFILE");
		displayPlatformInfo(platforms[i], CL_PLATFORM_VERSION, "CL_PLATFORM_VERSION");
		displayPlatformInfo(platforms[i], CL_PLATFORM_NAME, "CL_PLATFORM_NAME");
		displayPlatformInfo(platforms[i], CL_PLATFORM_VENDOR, "CL_PLATFORM_VENDOR");
		displayPlatformInfo(platforms[i], CL_PLATFORM_EXTENSIONS, "CL_PLATFORM_EXTENSIONS");
	}
	std::cout << "\nPress Enter to Continue";
	std::cin.ignore();
	return 0;
}

Im not particularly adept with c++ and the book seems to be writing for C so that may be where the error lies but if anyone can help me that would be great