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A few problems from a CS homework due tonight!

Please help! Using Python 3.4

1. Write an expression whose value is the result of converting the str value associated with s to an int value. So if s were associated with “41” then the resulting int would be 41.

Answer; int(s)

2. Write an expression whose value is the last character in the str associated with s.

Answer; s[-1]

3. Given variables first and last, each of which is associated with a str, representing a first and a last name, respectively. Write an expression whose value is a str that is a full name of the form “Last, First”. So, if first were associated with “alan” and last with “turing”, then your expression would be “Turing,Alan”. (Note the capitalization! Note: no spaces!) And if first and last were “Florean” and “fortescue” respectively, then your expression’s value would be “Fortescue,Florean”.

Answer;

# Codelab 50773
# Given variables  first and last, each of which is associated with a str,
# representing a first and a last name, respectively. Write an expression whose
# value is a str that is a full name of the form "Last, First".
# So, if first were associated with "alan" and last with "turing",
# then your expression would be "Turing,Alan". (
# Note the capitalization! Note: no spaces!)
# And if first and last were "Florean" and "fortescue" respectively,
# then your expression's value would be "Fortescue,Florean".

first = 'aLaN'
last = 'tuRING'

last.capitalize() + "," + first.capitalize()


# Codelab 50250
# Assume there is a variable h already associated with a positive integer value.
# Write the code necessary to compute the sum of the first h perfect squares,
# starting with 1.
# (A perfect square is an integer like 9, 16, 25, 36 that is equal to the
# square of another integer (in this case 3*3, 4*4, 5*5, 6*6 respectively).)
# Associate the sum you compute with the variable  q.
# For example, if h is 4, you would assign 30 to q because the first
# 4 perfect squares (starting with 1) are: 1, 4, 9, 16 and 30==1+4+9+16. 

h = 4

q = 0
for k in range(1, h + 1):

    q = q + k**2


# Codelab 50177
# Given a variable  n refers to a positive int value,
# use two additional variables , k and total to write a for loop to
# compute the sum of the cubes of the first n counting numbers,
# and store this value in total.
# Thus your code should put 1*1*1 + 2*2*2 + 3*3*3 +... + n*n*n
# into total. Use no variables  other than n, k, and total. 

n = 3

total = 0
for k in range(1,n+1):
    total = total + k**3





from graphics import *

Win = GraphWin("CSI", 600, 400)


Win.setCoords(0, 0, 60, 40)

# Other reasonable coordinates:
#W.setCoords(0, 0, 600, 400)
#W.setCoords(0, 0, 6, 4)

P = Point(60, 40)

C1 = Circle(Point(30,20), 10)
C2 = Circle(P, 20)

C1.draw(Win)
C2.draw(Win)





from graphics import *

Win = GraphWin("CSI", 600, 400)
Win.setCoords(0, 0, 60, 40)

shape = Circle(Point(30,20), 10)
shape.setFill('red')
shape.draw(Win)

for i in range(10):
    p = Win.getMouse()
    c = shape.getCenter()
    dx = p.getX() - c.getX()
    dy = p.getY() - c.getY()
    shape.move(dx, dy)

Win.close()

4. Write an expression whose value is the result of converting the int value associated with x to a str. So if 582 was the int associated with x you would be converting it to the str “582”.

Answer; str(x)

5. Write an expression whose value is the str consisting of all the characters (starting with the sixth) of the str associated with s.

Answer; s[5:]

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