C++ help, reading from wav

Hallo
I am trying to read the contents of an audio file using c++. What i'm trying to do is to get the information from it. I am thinking that i could get some numbers that should represent the amplitude of the signal(so that the sound is composed of many numbers). I am trying to get the numbers, like the example from the description of a Wave file, from this link https://ccrma.stanford.edu/courses/422/projects/WaveFormat/
I tryed to get the info , but the problem is that i get some FFFFFFEB values, that i don't find in that standard from the link above. Those values are even at the beginning, where they shoudn't be. Did i made a mistake in this program i wrote?
Thank you very much

This is the code:

Code:

#include <iostream>
#include <iostream>
#include <fstream>
#include <string>
#include <stdio.h>

using namespace std;

int main()
{
	const char *g="file.txt";
	const char *h="out.txt";
	
	FILE *file;
	FILE *pFile;
	char *buffer;
	unsigned long fileLen;

	//Open file
	file = fopen(g, "rb");
	if (!file){fprintf(stderr, "Unable to open file %s", "file1.WAV");}
	
	//Get file length
	fseek(file, 0, SEEK_END);
	fileLen=ftell(file);
	fseek(file, 0, SEEK_SET);

	//Allocate memory
	buffer=(char *)malloc(sizeof(char)*(fileLen+1));
	if (!buffer){fprintf(stderr, "Memory error!");fclose(file);}

	//Read file contents into buffer
	fread(buffer, fileLen, 1, file);
	fclose(file);

	//Do what ever with buffer
	//46
 //   for (int c=0;c<fileLen;c++)
    for (int c=0;c<46;c++)
{
     printf("%.2X ", (int)buffer[c]);

     // put an extra space between every 4 bytes
     if (c % 4 == 3)
     {
         printf(" ");
     }

     // Display 16 bytes per line
     if (c % 16 == 15)
     {
         printf("\n");
     }
}

	
	
	 pFile = fopen ( h , "wb" );
	// fwrite (buffer , 1 , sizeof(buffer) , pFile );
//	  char name [100];
//for (int c=0;c<fileLen;c++)
for (int c=0;c<46;c++)
{
     fprintf(pFile,"%.2X ", (int)buffer[c]);

     // put an extra space between every 4 bytes
     if (c % 4 == 3)
     {
         fprintf(pFile," ");
     }

     // Display 16 bytes per line
     if (c % 16 == 15)
     {
         fprintf(pFile,"\n");
     }
}

  fclose (pFile);
	
		free(buffer);
    return 0;
}