Python includes exercises 76

Python 100 Li

Title: Write a function that input n is an even number, call the function evaluation 1/2 + 1/4 + ... + 1 / n, when the input n is odd, the function is called 1/1 + 1/3 + .. . + 1 / n (use the pointer function)

Program Analysis: None.

Source Code:

#!/usr/bin/python
# -*- coding: UTF-8 -*-

def peven(n):
    i = 0
    s = 0.0
    for i in range(2,n + 1,2):
        s += 1.0 / i
    return s

def podd(n):
    s = 0.0
    for i in range(1, n + 1,2):
        s += 1 / i
    return s

def dcall(fp,n):
    s = fp(n)
    return s

if __name__ == '__main__':
    n = int(raw_input('input a number:\n'))
    if n % 2 == 0:
        sum = dcall(peven,n)
    else:
        sum = dcall(podd,n)
    print sum

The above example output is:

input a number:
6
0.916666666667

Python 100 Li