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標題: 關于51單片機C語言求數組大小的問題 [打印本頁]

作者: SuperYh 時間: 2023-3-7 22:57
標題: 關于51單片機C語言求數組大小的問題
單片機C語言源程序如下:
//---------------------------------------------------------------------------------------------------------------
/*MODE:Triangle*/
char code Mode_Tri[]=
{0x08,0xF8,0xF8,0x00,0xF8,0xF8,0x08,0x00,0x20,0x3F,0x01,0x3E,0x01,0x3F,0x20,0x00,/*"M",0*/

0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,0x0F,0x10,0x20,0x20,0x20,0x10,0x0F,0x00,/*"O",1*/

0x08,0xF8,0x08,0x08,0x08,0x10,0xE0,0x00,0x20,0x3F,0x20,0x20,0x20,0x10,0x0F,0x00,/*"D",2*/

0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,0x20,0x3F,0x20,0x20,0x23,0x20,0x18,0x00,/*"E",3*/

0x00,0x00,0x00,0xC0,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00,/*":",4*/

0x18,0x08,0x08,0xF8,0x08,0x08,0x18,0x00,0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,/*"T",5*/

0x80,0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x20,0x20,0x3F,0x21,0x20,0x00,0x01,0x00,/*"r",6*/

0x00,0x80,0x98,0x98,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,/*"i",7*/

0x00,0x00,0x80,0x80,0x80,0x00,0x00,0x00,0x00,0x19,0x24,0x24,0x12,0x3F,0x20,0x00,/*"a",8*/

0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,/*"n",9*/

0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x6B,0x94,0x94,0x94,0x93,0x60,0x00,/*"g",10*/

0x00,0x10,0x10,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,/*"l",11*/

0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x1F,0x24,0x24,0x24,0x24,0x17,0x00};/*"e",12*/
//---------------------------------------------------------------------------------------------------------------

我想求如上字模數組的字符數
void getCharSize(unsigned char zk*)
{
unsigned char charNum = sizeof(zk)/sizeof(*(zk))/16；
//這里用Keil Debug看了，charNum =0x03;
}

麻煩請教一下大佬，如何才能在函數體內求得正確的字符數大小

作者: hy47566398 時間: 2023-3-8 01:24
strlen(char*)

作者: coody_sz 時間: 2023-3-8 09:53
你試試 unsigned char charNum = sizeof(zk)/16，就可以得到字符數。

作者: SuperYh 時間: 2023-3-8 10:56

coody_sz 發表于 2023-3-8 09:53
你試試 unsigned char charNum = sizeof(zk)/16，就可以得到字符數。

這個方法已經試過了，不太管用

作者: MTK117 時間: 2023-3-9 10:04
sizeof(zk)/sizeof(zk[0])

作者: qsssuv 時間: 2023-3-9 10:54
不可以的，數組經過函數形參傳參后，會退化為指針的。得使用sizeof(Mode_Tri)/16

作者: 暖西夏 時間: 2023-3-9 14:22
直接strlen就可以啊

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