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Perimeter of polygon and area of triangle
Hello:
Need help to figure out why my code fail to compile in the following functions:
perimeter = perimeter + yc[i].distanceTo(yc[i+1]); //get polygon perimeter
area = x1 * (y2 - y3) + x2 * (y3 - y1) + x3 * (y1 - y2) / 2; //get area triangle
here is my code:
Last edited by term204; April 15th, 2018 at 08:19 PM.
Re: Perimeter of polygon and area of triangle
Please copy the full text of the error message and paste it here. It has important info about the error(s).why my code fail to compile
If you don't understand my answer, don't ignore it, ask a question.
Re: Perimeter of polygon and area of triangle
Here is the error:
Herencia.java:109: error: array required, but double found
perimeter = perimeter + yc[i].distanceTo(yc[i+1]);
^
Herencia.java:109: error: array required, but double found
perimeter = perimeter + yc[i].distanceTo(yc[i+1]);
^
Herencia.java:156: error: cannot find symbol
area = x1 * (y2 - y3) + x2 * (y3 - y1) + x3 * (y1 - y2) / 2;
^
symbol: variable x1
location: class Triangulo
Herencia.java:156: error: cannot find symbol
area = x1 * (y2 - y3) + x2 * (y3 - y1) + x3 * (y1 - y2) / 2;
^
symbol: variable y2
location: class Triangulo
Herencia.java:156: error: cannot find symbol
area = x1 * (y2 - y3) + x2 * (y3 - y1) + x3 * (y1 - y2) / 2;
^
symbol: variable y3
location: class Triangulo
Herencia.java:156: error: cannot find symbol
area = x1 * (y2 - y3) + x2 * (y3 - y1) + x3 * (y1 - y2) / 2;
^
symbol: variable x2
location: class Triangulo
Herencia.java:156: error: cannot find symbol
area = x1 * (y2 - y3) + x2 * (y3 - y1) + x3 * (y1 - y2) / 2;
^
symbol: variable y3
location: class Triangulo
Herencia.java:156: error: cannot find symbol
area = x1 * (y2 - y3) + x2 * (y3 - y1) + x3 * (y1 - y2) / 2;
^
symbol: variable y1
location: class Triangulo
Herencia.java:156: error: cannot find symbol
area = x1 * (y2 - y3) + x2 * (y3 - y1) + x3 * (y1 - y2) / 2;
^
symbol: variable x3
location: class Triangulo
Herencia.java:156: error: cannot find symbol
area = x1 * (y2 - y3) + x2 * (y3 - y1) + x3 * (y1 - y2) / 2;
^
symbol: variable y1
location: class Triangulo
Herencia.java:156: error: cannot find symbol
area = x1 * (y2 - y3) + x2 * (y3 - y1) + x3 * (y1 - y2) / 2;
^
symbol: variable y2
location: class Triangulo
11 errors
Re: Perimeter of polygon and area of triangle
Primitive variables do not have methods. yc[i] is a double. double is a primitiveHerencia.java:109: error: array required, but double found
perimeter = perimeter + yc[i].distanceTo(yc[i+1]);
^
What are you trying to do in that statement.
The compiler can not find a definition for the variable named in those error messages. Make sure the variables are defined in scope where they are being used. In scope means within the same pair of {}s.Herencia.java:156: error: cannot find symbol
If you don't understand my answer, don't ignore it, ask a question.
term204 (April 15th, 2018)
Re: Perimeter of polygon and area of triangle
I do not know the formula to get the perimeter of the polygon..What are you trying to do in that statement.i found similar code on internet and i try to insert here..
ThanksThe compiler can not find a definition for the variable named in those error messages. Make sure the variables are defined in scope where they are being used. In scope means within the same pair of {}s.
Re: Perimeter of polygon and area of triangle
We need to see more code in order to solve
Whatever you are, be a good one
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