what's wrong with delete [] a[0];

[Angela2010]

Hi all ,
I wrote a program, but there is a problem, it reminds "debug error!", I have found that the problem was in "ginv:: ~ginv (){}" but I don't know how to solve it,can anyone help me with this, thank you !

void CCalginvView::OnCalginv() 
{
	// TODO: Add your command handler code here
	ginv  uv(5, 4);
	uv.input ();         //由文件读入矩阵A的元素以及eps
	uv.a_ginv ();           //计算广义逆
	uv.output ();        //输出U矩阵和V矩阵以及奇异值

}

//1GINV.h
  #ifndef GINV_H_H
  #define GINV_H_H

  #include  <iostream>
  #include  <fstream>
  #include  <cmath>
  using namespace std;
  class  ginv
  {
  private: 
	  int m, n, ka;
	  double  **a, **u, **v, **aa, eps;
	  double  *s, *e, *w, fg[2], cs[2];
	
  public:
	 ginv (int mm, int nn);
                 void input ();        
	 void uav ();          //svd
           void ppp();            
           void sss();            
           void a_ginv ();         
	 void output ();        
	 ~ginv ();
   };
  #endif

 //1GINV.CPP
  #include "stdafx.h"
  #include  <iostream.h>
  #include  <fstream.h>
  #include  <math.h>
  #include "ginv.h"


#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
  static char THIS_FILE[] = __FILE__;
#endif
ginv::ginv (int mm, int nn)
	{
			   int i;
			   m = mm; n= nn;
	           a = new double*[m];   //动态分配内存空间
	           for (i=0; i<m; i++) a[i] = new double[n];
	           u = new double*[m];
	           for (i=0; i<m; i++) u[i] = new double[m];
	           v = new double*[n];
	           for (i=0; i<n; i++) v[i] = new double[n];
	           aa = new double*[n];
	           for (i=0; i<n; i++) aa[i] = new double[m];
               ka = m + 1;
	           if (m < n)  ka = n + 1;
               s = new double[ka];
               e = new double[ka];
               w = new double[ka];
	 }	

ginv:: ~ginv ()
	{
	int i;
	
	for (i=0; i<m; i++)	{ delete []a[i]; }
	delete [] a;
	for (i=0; i<m; i++) { delete [] u[i]; }
	delete [] u;
	for (i=0; i<n; i++) { delete [] v[i]; }
	delete [] v;
	for (i=0; i<n; i++) { delete [] aa[i]; }
	delete [] aa;
		delete [] s, e, w;
	 }
           ..............