二元一次函数的实现 import cmathimport mathimport sys 这里导入cmath包是在后面用来处理复数的情况导入math使用来处理 平方 根号等的运算而导入sys的意义是为了比较0 ,在python中float的精度值不够,所以在计算复数时需要用到sys.float_info.epsilon def get_float(msg,allow_zero): x =None while x is None: try: x= fl
python求100以内素数之和 from math import sqrt # 使用isPrime函数 def isPrime(n): if n <= 1: return False for i in range(2, int(sqrt(n)) + 1): if n % i == 0: return False return True count = 0 for i in range(101): if isPrime(i): count += i print(count) # 单行程序扫描素数
import cmath import math import sys def get_float(msg,allow_zero): x = None while x is None: try: x = float(input(msg)) if not allow_zero and abs(x) <sys.float_info.epsilon: print("zero is not allowed") x = None except ValueError as err: prin