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2026-07-22T18:05:25Z
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Chao: /* Data Type */
2021-05-19T10:44:56Z
<p><span dir="auto"><span class="autocomment">Data Type</span></span></p>
<p><b>New page</b></p><div>== Basic ==<br />
[[typedef]]<br><br />
C 语言提供了 typedef 关键字，您可以使用它来为类型取一个新的名字。下面的实例为单字节数字定义了一个术语 BYTE：<br />
typedef unsigned char BYTE;<br />
[[Operator]]<br><br />
[[Pointer]]<br><br />
[[Struct]]<br><br />
<br />
== Language ==<br />
* [https://en.wikipedia.org/wiki/Operators_in_C_and_C%2B%2B Operators in C]<br />
== Compiler ==<br />
* Linux GCC<br />
* HI-TECH PICC for PIC<br />
<br />
=== Declaration ===<br />
* [http://en.cppreference.com/w/cpp/language/enum enum]<br />
* [http://c.biancheng.net/cpp/html/88.html struct]<br />
=== Data Format ===<br />
{| class="wikitable sortable"<br />
|-<br />
! From !! to !! function !! example !! description !! reference<br />
|-<br />
| String || char || toCharArray || sensorVal.toCharArray(sensorPrintout, 4); || ||TFT <br />
|-<br />
| float || string || dtostrf || dtostrf(f_volt, 6, 2, volt_char); || f_volt is float value<br />
|-<br />
| Example || Example || Example<br />
|}<br />
<br />
* <br />
* printf<br />
* String aaa = String(bbb) // bbb is char array<br />
<br />
== Header file Definition ==<br />
=== Define macro === <br />
For examples set pins for segment display, file seg.h<br />
* Further refer to SFR_Macro.h in BSP of nuvoton<br />
<source lang="c"><br />
#define set_a P05 = 1<br />
#define set_b P03 = 1<br />
#define set_c P10 = 1<br />
#define set_d P01 = 1<br />
#define set_e P07 = 1<br />
#define set_f P02 = 1<br />
#define set_g P14 = 1<br />
#define set_dot P00 = 1<br />
</source><br />
<br />
=== Define type ===<br />
<source lang="c"><br />
typedef bit BIT;<br />
typedef unsigned char UINT8;<br />
typedef unsigned int UINT16;<br />
typedef unsigned long UINT32;<br />
<br />
typedef unsigned char uint8_t;<br />
typedef unsigned int uint16_t;<br />
typedef unsigned long uint32_t;<br />
</source><br />
<br />
== Complier ==<br />
* [[Mingw]] for windows <br />
== Reference ==<br />
* https://www.runoob.com/cplusplus/cpp-pointers.html<br />
* https://www.cplusplus.com/doc/tutorial/functions/<br />
<br />
<br />
<br />
[[category: Code]]<br />
<br />
<br />
<br />
[[category: Language]]</div>
Chao