Programming in python

[Hashim]

I need help with programming in python. The following statement:
a, b, c refer to three lengths. Determine if it can construct a triangle. If yes, specify the type of triangle.

That's what I did, it seems a little more complicated and it does not work, though I find the problem I can not find it!

from math import * 
 
a=raw_input("dimension of the side BC: " ) 
b=raw_input("dimension of the side AC: " ) 
c=raw_input("dimension of the side AB: " ) 
a=float(a) 
b=float(b) 
c=float(c) 
 
x1=asin(a/c) 
x2=asin(b/c) 
x3=atan(c/b) 
 
x=x1+x2+x3 
 
if x==pi: 
    if x1==(pi/2) or x2==(pi/2) or x3==(pi/2): 
        print "ABC is a triangle" 
    elif x1==x2 or x2==x3 or x1==x3: 
        print "ABC is a isosceles triangle" 
    elif x1==x2 and x2==x3 and x3==(pi/3): 
        print "ABC is an equilateral triangle" 
    else: 
        print "ABC is any triangle" 
else: 
    print "ABC isn't a triangle"

[Katty]

Hello, a few remarks about your program: it works well but ...
(1) add the line

#  -*- coding: utf-8 -*-

at the beginning of your code, if you have a problem with accents in your text
(2) does not

from math import *

it seems simple but in reality it is a source of error, for later, when your code has grown.

(3) instead of:

a = float (a)
b = float (b)
c = float (c)

You can also write:

a, b, c = float (a), float (b), float (c)

[Modifier]

Hello, a few remarks about your program: it works well but ...

Not necessarily, it depends potential platform: it makes strict equality on floating

[Reegan]

You must use an epsilon (basically you determine a margin of error, you subtracted the two numbers to compare and if the result is less than your margin of error you consider that they are equal).

There are other strategies, but they impose limitations (and potentially impact the level of performance) and are not necessarily used as appropriate: to make his calculations with integers (by adding powers of 10 baseline, this is how the calculations are made monetary) or by the fixed-point arithmetic or decimal. In python, the role of the decimal module precisely.

[glenfordwilliams]

am not sure why u wrote this code like that but but i made a few changes to it myself

#  -*- coding: utf-8 -*-
import math 
 
a=raw_input("dimension of the side BC: " ) 
b=raw_input("dimension of the side AC: " ) 
c=raw_input("dimension of the side AB: " ) 
a=float(a) 
b=float(b) 
c=float(c) 
 
x1 = math.sin(a/c) 
x2 = math.sin(b/c) 
x3 = math.tan(c/b) 
 
x=x1+x2+x3
pi=3.142
 
if x==pi: 
    if x1==(pi/2) or x2==(pi/2) or x3==(pi/2): 
        print "ABC is a triangle" 
    elif x1==x2 or x2==x3 or x1==x3: 
        print "ABC is a isosceles triangle" 
    elif x1==x2 and x2==x3 and x3==(pi/3): 
        print "ABC is an equilateral triangle" 
    else: 
        print "ABC is any triangle" 
else: 
    print "ABC isn't a triangle"