一位数码管显示0-F的数字 目的：1.通过本例程了解 74HC595（串入并出）基本原理和使用2.熟悉用STM32控制595程序处理3.比较STM32与51的区别-A digital display 0-F digital purposes: 1. Understanding through this routine 74HC595 (string into and out of) the basic principles and use 2. Familiar with STM32 contr

常用的字符串处理算法的c程序，如数出一串字符串有几个逗号，小数点前后的整型与浮点型数字的转换-Commonly used string processing algorithm c procedures, such as out of a string of several commas, the decimal point and integer and floating-point digital conversion