how to change the element of vector

[blacksource]

thanks

but i can`t find the problem with my code

void CDelta::Decompose( int m, int n)
{
 int index = 0;
 if( m==0 )
  CreateU( index++ ); 
 else
  for( int i = m; i >= 1; i-- )
  {
   if( n == 0 || i <= m_vectTemp[n-1] )
   {
	if( m_vectTemp.size() > n )
	 m_vectTemp[n] = i;
	else
	 m_vectTemp.push_back( i );
	Decompose( m-i, n+1 );
   }
  }
/*  
	int i; 
 if(m==0) 
  show(n); 
 else 
  for(i=m;i>=1;i--) 
   if(n==0||i<=a[n-1]) 
   {
	a[n]=i;
	decompose(m-i,n+1);
   } 
*/
}

there is no error when debugging, but it prompt error when running