题目：文本编辑

一、需求分析

1、任务：输入一页文字，程序可以统计出文字、数字、空格的个数。

静态存储一页文章，每行最多不超过80个字符，共N行；

2、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。

存储结构使用线性表，分别用几个子函数实现相应的功能；

3、输入数据的形式和范围：可以输入大写、小写的英文字母、任何数字及标点符号。

输出形式：

(1) 分行输出用户输入的各行字符；

(2) 分4行输出"全部字母数"、"数字个数"、"空格个数"、"文章总字数"；

(3) 输出删除某一字符串后的文章；

-topics : a text editor, a demand analysis, the task : the importation of a language that the procedure can be written out statistics, figures, the number of spaces. A static storage article, every trip up to more than 80 characters, a total of N; 2, requirements : (1) were the statistics on the English alphabet and the number of spaces and the number of the total number of words in the entire article; (2) a string statistics in the article, the frequency and the output frequency; (3) delete certain substrings. the characters will be behind advancing. The use of linear storage structure forms, few realize Functions corresponding function; 3, input data in the form and scope : the importation of capital and lowercase English letters, numbers and punctuation any. Output forms : (a) the output