方差计算器软件以及C++源代码，源码添加了注释，自认为已经很详细，但是有关于数据结构的部分我可以算没有添加任何注释了，因为数据结构这个东西我不认为添加一点注释是能够理解的。

　　用VC6编写，Win32 Application程序，源码均由个人完成。实现大致思路：

　　定义一个字符串，用于存储输入的数据，提取第一个字符到 mbi，如果其中有一个字符不是为数字、小数点、负号，将终止循环，那么mbi的值将不会是 \0 ，如果负号出现在除位置1以前的其它位置，或者小数点的个数已经超过1，那么将终止循环，如果这是一个小数点，那么将0赋值给num，可以防止在用户输入小数点后没有输入数据但检测不到错误的情况，重新给mbi赋值 如果此时已经是next字符串的最后一个字符，那么赋值之后mbi的值便是 \0 -Variance calculator software and C++ source code, source code to add a note, since that is already very detailed, but there on the part of the data structure that I can count did not add any comments, because the data structure of this thing, I do not think that adding a little note to be able to understand the.

Written by VC6, Win32 Application procedures source completed by the individual. Achieve general idea:

Define a string input for data storage, extract the first character to mbi, if there was a character not as a number, decimal point, minus sign, will terminate the loop, then the value will not be mbi　\ 0　If a negative number in addition to a previous position elsewhere, or decimal number has more than one, then the cycle will be terminated if it is a decimal point, then 0 is assigned to num, can prevent the user input is not entered after the decimal point data but does not detect the error, re-assignment to mbi next if this time is the last character of the string, the