Euclidian distance between 2 double arrays

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VS2008

C++

Visual-Studio

, +

I wrote the following code for calculating the euclidian distance between 2 arrays:

C++

double dist(double x[3], double y[3])
{
	double Sum;
	double distance;
	for(int i=0;i<3;i++)
	{
		Sum = Sum + pow((x[i]-y[i]),2.0);
		distance = sqrt(Sum);
	}
	return distance;
}

When I try to assign the distance to another array

double asd[3]=dist(brick_v[3],metal_v[3]);

the compiler gives me the following error error C2664: 'dist' : cannot convert parameter 1 from 'double' to 'double []'.

Can anyone point out what I did wrong?

Thanks.

Posted 14-Sep-11 5:38am

Alex_baner

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User 7429338 · Accepted Answer · 2011-09-14T05:48:00

Your dist() function is expecting an array of 3 doubles. Assuming your input variables are declared like so:

double brick_v[3];
double metal_v[3];

You should call dist() like so:

dist(brick_v,metal_v);

Note that the return value of dist() is a double (one number) and not an array of doubles, so your variable asd should be filled like this:

double asd = dist(brick_v,metal_v);

Simon Bang Terkildsen · Accepted Answer · 2011-09-14T05:48:00

Solution 3

dist takes two double arrays of length 3, you're passing two doubles, assuming brick_v is an array of double then brick_v[3] is a double

Posted 14-Sep-11 5:48am

Simon Bang Terkildsen