题目:输入一行字符,分别统计出其中英文字母、空格、数字和其它字符的个数。
程序分析:利用 while 或 for 语句,条件为输入的字符不为 '\n'。
实例(Python2.x) - 使用 while 循环
#!/usr/bin/python# -*- coding: UTF-8 -*-importstrings = raw_input('请输入一个字符串:\n')letters = 0space = 0digit = 0others = 0i=0whilei < len(s): c = s[i] i += 1 ifc.isalpha(): letters += 1 elifc.isspace(): space += 1 elifc.isdigit(): digit += 1 else: others += 1print'char = %d,space = %d,digit = %d,others = %d' % (letters,space,digit,others)
实例(Python3.x) - 使用 for 循环
#!/usr/bin/python3importstrings = input('请输入一个字符串:\n')letters = 0space = 0digit = 0others = 0forcins: ifc.isalpha(): letters += 1 elifc.isspace(): space += 1 elifc.isdigit(): digit += 1 else: others += 1print('char = %d,space = %d,digit = %d,others = %d' % (letters,space,digit,others))
以上实例输出结果为:
请输入一个字符串:
123runoobc kdf235*(dfl
char=13,space =2,digit =6,others =2