trace.c

来自「speech signal process tools」· C语言 代码 · 共 15 行

double 
trace(M,n)/* return trace of double matrix */
register double *M;
register int n;
{
	register int i,con;
	register double sum;

	sum=0;
	con=n+1;
	for(i=0;i<n;i++,M+=con)
		sum+= *M;
	return(sum);
}