Probleme en C

int Compute_metric(double *y, double **w, unsigned int n, double amp)

{

  // This function computes the metric m for each symbol using the received signal y

  //   and the signal amplitude amp

  // y is the pointer to the received signal

  // w is the pointer to the metric matrix (2^N rows, n columns)

  // n is the length of y ( Frame_Length+M)

  // amp is the amplitude of the signal



  // ***** COMPUTE THE TRELLIS METRIC MATRIX *******

 

unsigned int i;

unsigned int l;



	// for each transition compute the corresponding metric

for(i=0;i<n;i++) // For each transition

{

	for( l=0;l<N;l++)

	{

		**(w+i) += - fabs(*(y+(n*i+l))-(*(x+l))*amp)**2;

	}

}



  // ***** END COMPUTING THE TRELLIS METRIC MATRIX ************

  return(0);

}