字符串处理。 简单的，Win32（dos）字符界面，有简单加密、替换、统计单词数等功能。

本程序实现从文本中读取字符串，统计该文本字符串中各字母出现的次数；另以colloc（）动态分配内存，实现文本指针的重新定位。-This procedure realize from the text read string, statistics the number of occurrences of each letter in the text string Another colloc () dynamically allocated memory, realize the text

字符串中为一个字符数量统计，经典的华为校招试题-Character string for a number of statistics, the classic HUAWEI school recruit examination questions