from math import *
from tkinter import *

def II(x):
    return I1 + int((x - X1)*(I2 - I1)/(X2 - X1))

def JJ(y):
    return J2 + int((y - Y1)*(J1 - J2)/(Y2 - Y1))

def F(x):
    if x == 0: 
        f = 1
    else:
        f = sin(x)/x
    return f 

X1 = -5 * pi
X2 = 5 * pi
Y1 = -1.2
Y2 = 1.2
I1 = 0
J1 = 0
I2 = 500
J2 = 500
n = 25
h = (X2 - X1)/n

root = Tk()
root.title(' F(x) = sin(x)/x, -5*pi<=x<=5*pi')

canv = Canvas(root, width = I2, height = J2, bg = 'lightblue')
canv.create_line(II(0), JJ(Y1), II(0), JJ(Y2), width = 2)
canv.create_line(II(X1), JJ(0), II(X2), JJ(0), width = 2)

points = []
x = X1
for i in range(n):
    y = F(x)
    P = (II(x), JJ(y))
    points.append(P)
    x = x + h
    
canv.create_line(points, width = 1, fill = 'green', smooth = 1)

for i in range(5):
    canv.create_text(20, 210 - i*40, text =  str(int(100*(Y2-Y1))/1000 + int(i * (Y2-Y1))/1000))
    canv.create_line(II(int(Y2-Y1)/10), JJ(0), II(0), JJ(int(Y2-Y1)/10), width = 2)
for i in range(5):
    canv.create_text(20, 290 + i*40, text =  '-' + str(int(100*(Y2-Y1))/1000 + int(i * (Y2-Y1))/1000))

for i in range(5):
    canv.create_text(290 + i * 40, 20, text = str(int(100*(X2-X1))/1000 + int(i * (X2-X1))/1000))
for i in range(5):
    canv.create_text(210 - i * 40, 20, text = '-' + str(int(100*(X2-X1))/1000 + int(i * (X2-X1))/1000))

canv.pack()
root.mainloop()