这个文档里面含源代码和实现文档，主要包含以下几个功能：1.从键盘输入n个数，并按从小到大输出，并且可以多次进行。2.从一个.txt文件中读出数据，并且按从小到大输出 。 3.从键盘输入一个数组的值，将数组的值逆序并输出 4.输入一行字符，统计其中的英文字母，空格，数字，和其他字符的个数 等等，里面有实现6个功能-This document which contains the source code and implementation documentation, including the following major functions: 1. N numbers from the keyboard, press the small to large output, and can be repeated. (2) from a. Txt file in read data, and by small to large output. 3 array from the keyboard to enter a value, the value of the array in reverse order and output 4 input line characters, statistics on the English letters, spaces, numbers, and number of other characters, etc., which have up to six functions