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32
bac1/q1/29sept/ex1-2.py
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32
bac1/q1/29sept/ex1-2.py
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def rendreMonnaie(prix, monnaie):
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x1, x2, x3, x4, x5 = monnaie # Chaques billets en entree (20, 10, 5, 2, 1)
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given = (x1*20) + (x2*10) + (x3*5) + (x4*2) + (x5*1)
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rest = given - prix
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if rest < 0:
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return f"vous n'avez pas assez d'argent. Il manque : {-rest}"
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o1 = rest // 20
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rest = rest % 20
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o2 = rest // 10
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rest = rest % 10
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o3 = rest // 5
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rest = rest % 5
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o4 = rest // 2
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rest = rest % 2
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o5 = rest // 1
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rest = rest % 1
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return o1, o2, o3, o4, o5
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if __name__ == "__main__":
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prix = int(input("quel est le prix :"))
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print("entrez maintenant les billets")
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mon = (int(input("20e:")),int(input("10e:")),int(input("5e:")),int(input("2e:")),int(input("1e:")))
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print(rendreMonnaie(prix, mon))
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124
bac1/q1/29sept/ex2-1/droite.py
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bac1/q1/29sept/ex2-1/droite.py
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from math import floor, sqrt
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def transform_mp_to_abc(m, p):
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"""transforme une équation de la forme y = mx + p to ax + by = c
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:returns: 3-uple of a, b, c
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"""
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return -m, 1, p
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def transform_abc_to_mp(a, b, c):
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"""transforme une équation de la forme to ax + by = c to y = mx + p
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:returns: tuple of m, x
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"""
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return -a/b, c
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def droite(p1: tuple, p2: tuple) -> tuple:
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"""retourne un 3-uple d'une droite selon ax+by=c
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:p1: tuple du point 1
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:p2: tuple du point 2
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:returns: 3-uple (a,b,c) tq ax+by=c
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"""
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x1, y1 = p1
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x2, y2 = p2
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if p1 == p2:
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return
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if x2-x1 == 0:
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return 1, 0, 0
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a = -(y2-y1)/(x2-x1)
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c = a*x1
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b = (-a*x2 + c) / y2
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return a, b, c
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def appartient(d, p):
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"""
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:d: equation d'une droite
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:p: point
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:returns: true si point est dans droite
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"""
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a, b, c = d
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x, y = p
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return a*x + b*y == c
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def paralleles(d1, d2):
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"""
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:d1: droite 1
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:d2: droite 2
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:returns: true si d1 et d2 sont paralleles sinon false
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"""
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a1, b1, c1 = d1
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a2, b2, c2 = d2
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return a1/b1 == a2/b2
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def intersection(d1, d2):
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"""Trouve le point d'intersection
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:d1: droite 1
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:d2: droite 2
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:returns: retourne le point d'intersection sinon None
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"""
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a1, b1, c1 = d1
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a2, b2, c2 = d2
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if paralleles(d1, d2):
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return # paralleles donc pas d'intersection
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y = (c2*a1 - a2*c1) / (-a2*b1 + b2*a1)
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x = (c1 - b1*y)/ a1
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return x, y
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def droite_normale(d, p):
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"""trouve la normale dune droite passant par un point.
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:d: droite
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:p: point
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:returns: retourne la normale de la droite passant par le point
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"""
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a, b, c = d
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x, y = p
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m, p = transform_abc_to_mp(a, b, c)
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return transform_mp_to_abc(-1/m, y-(-1/m)*x)
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def symetrie_orthogonale(d, p):
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""" retourne la symétrie orthogonale par le point p de la droite d
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:returns: symétrie orthogonale
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"""
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a, b, c = d
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x, y = p
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ap, bp, cp = droite_normale(d, p) # perpendiculaire passant par le point
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xi, yi = intersection((a, b, c), (ap, bp, cp))
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return round((2*xi - x)*10)/10, round((2*yi - y)*10)/10
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def distance_droite_point(d, p):
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""" donne la distance entre une droite et un point
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:returns: distance la plus courte entre le point et la droite
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"""
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a, b, c = d
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x, y = p
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ap, bp, cp = droite_normale(d,p) # perpendiculaire passant par le point
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xi, yi = intersection((a,b,c), (ap, bp, cp))
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return sqrt((xi-x)**2 + (yi-y)**2)
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38
bac1/q1/29sept/ex2-1/droite_test.py
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bac1/q1/29sept/ex2-1/droite_test.py
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from droite import *
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def test(function, p1, p2, exp_result):
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fun_result = function(p1, p2)
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if fun_result == exp_result:
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print(f"{function.__name__}({p1}, {p2}) == {exp_result} --- SUCCESS!")
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else:
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print(f"{function.__name__}({p1}, {p2}) == {exp_result} --- ERROR! (result was:{fun_result})")
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def tests():
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test(droite, (-2, 0), (1, 1.5), (-0.5, 1, 1.0))
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test(droite, (0, -3), (0, 5), (1, 0, 0))
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test(droite, (0, -1), (0, -1), None)
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test(appartient, (-0.5, 1, 1.0), (-2, 0), True)
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test(appartient, (-0.5, 1, 1.0), (1, 1.5), True)
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test(appartient, (-0.5, 1, 1.0), (0, -1), False)
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test(paralleles, (0, 1, 1), (0, 2, 3), True)
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test(paralleles, (-0.5, 1, 1.0), (0, 2, 3), False)
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test(intersection, (-0.5, 1, 1.0), (0, 2, 3), (1.0, 1.5))
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test(intersection, (0, 1, 1), (0, 2, 3), None)
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test(droite_normale, (-0.5, 1, 1.0), (-2, 0), (2.0, 1, -4.0))
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test(droite_normale, (-0.5, 1, 1.0), (3, 4), (2.0, 1, 10.0))
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test(symetrie_orthogonale, (-0.5, 1, 1.0), (-2, 0), (-2.0, 0.0))
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test(symetrie_orthogonale, (-0.5, 1, 1.0), (3, 4), (4.2, 1.6))
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test(distance_droite_point, (-0.5, 1, 1.0), (3, 4), 1.3416407864998738)
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test(distance_droite_point, (-0.5, 1, 1.0), (-2, 0), 0.0)
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if __name__ == "__main__":
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tests()
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75
bac1/q1/29sept/plot.py
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bac1/q1/29sept/plot.py
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#!/usr/bin/env python3
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import matplotlib.pyplot as plt
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import numpy as np
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class Plot(object):
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"""Show graphical drawing of lines from their equation."""
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def __init__(self):
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self.setXAxis()
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self.functs = []
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self.verts = []
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def prepare(self, line):
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"""Add the given line to the plot.
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The line is not shown until the method show is called.
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Args:
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line: a triplet `(a, b, c)` representing the coefficients of the
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line of equation `ax + bx + c = 0`.
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"""
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a, b, c = line
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if b == 0:
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if a == 0:
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raise ValueError('Not a line.')
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else:
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self.verts.append(line)
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else:
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self.functs.append(line)
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def setXAxis(self, xmin=-10, xmax=10):
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self.xmin = xmin
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self.xmax = xmax
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def reset(self):
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self.setXAxis()
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self.functs = []
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self.verts = []
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def plot(self, t, y, line):
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a, b, c = line
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plt.plot(t, y, label='%.4g*x + %.4g*y = %.4g' % (a, b, c))
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def draw(self):
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for a, b, c in self.functs:
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t = np.array([self.xmin, self.xmax])
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y = (-a * 1.0 / b) * t + (c * 1.0 / b)
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self.plot(t, y, (a, b, c))
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for a, b, c in self.verts:
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x = c / a
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self.plot([x, x], plt.ylim(), (a, b, c))
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plt.axis('tight')
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plt.legend()
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plt.title('Exercices sur les droites')
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plt.xlabel('x')
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plt.ylabel('y')
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plt.grid(True)
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def save(self, filename):
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self.draw()
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plt.savefig(filename)
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def show(self):
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self.draw()
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plt.show()
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if __name__ == '__main__':
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p = Plot()
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p.prepare((1, 1, 3))
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p.prepare((-2, 1, -1))
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p.prepare((1, 0, -5))
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p.show()
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input()
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BIN
bac1/q1/29sept/serie2.pdf
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bac1/q1/29sept/serie2.pdf
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