C / C++ / MFC

struct _ptr
{
    double d; // value
    int n;    // original placement in array
} ptr[5] = {{-8, 0},{-9, 1},{5.6, 2},{3.4, 3},{0, 4}};
 
int Compare( const void *p1, const void *p2 )
{
    if (((_ptr *) p1)->d < ((_ptr *) p2)->d)
        return -1;
    else if (((_ptr *) p1)->d > ((_ptr *) p2)->d)
        return 1;
    else
        return 0;
}
 
void main( void )
{
    qsort(ptr, sizeof(ptr) / sizeof(ptr[0]), sizeof(ptr[0]), Compare);
    return;
}

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

void main( void )
{   
    cout << "Number   Index" << endl;
    cout << "------   -----" << endl;
 
    for (int x = 0; x < 5; x++)
        cout << "  " << ptr[x].d << "        " << ptr[x].n << endl;
     
    qsort(ptr, sizeof(ptr) / sizeof(ptr[0]), sizeof(ptr[0]), Compare);    
 
    cout << endl;
 
    for (x = 0; x < 5; x++)
        cout << "  " << ptr[x].d << "        " << ptr[x].n << endl;
}

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

<italic>Work hard and a bit of luck is the key to success.