# include & lt; iostream> 
#include  
using namespace std; 

Int main () 
{
Vector K; 
Written by K.r esize (5); 
Int a=& amp; K [1] - & amp; K [0]; 
Int b=& amp; K [2] - & amp; K [0]; 
Int c=& amp; K [3] - & amp; K [2]; 
cout } 

The result of the running for the

 1 2 1 

CodePudding user response:

Because K [1]... These are all double
& K [...]. The delegates is double *
So & amp; K [1] - & amp; K [0] is 1, the length of the 1 represents a double