文章编辑器

【内容与要求】

功能：输入一页文字，程序可以统计出文字、数字、空格的个数。

要求：

（1）分别统计出其中英文字母数和空格数及整篇文章总字数；

（2）统计某一字符串在文章中出现的次数，并输出该次数；

（3）删除某一子串，并将后面的字符前移。

（4）实现查找符合要求的某个字符串，能实现将该字符串替换为另一字符串

【提示】采用字符串实现。

-Articles Editor】 【content and functional requirements: Enter page text, the text can be statistics, numbers, the number of spaces. Requirements: (1) statistics, respectively, which a few letters of the alphabet and the space number and the total number of words whole article　(2) statistics of a string in the article appear in the frequency and the output of the frequency　(3) to delete a sub- string, and characters behind the forward. (4) to achieve compliance with the requirements of a search string, to achieve the replacement string to another string】 【prompted the realization of the use of string.