关于51单片机C语言求数组大小的问题 -

标题: 关于51单片机C语言求数组大小的问题 [打印本页]

作者: SuperYh 时间: 2023-3-7 22:57
标题: 关于51单片机C语言求数组大小的问题
单片机C语言源程序如下:
//---------------------------------------------------------------------------------------------------------------
/*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*/
//---------------------------------------------------------------------------------------------------------------

我想求如上字模数组的字符数
void getCharSize(unsigned char zk*)
{
unsigned char charNum = sizeof(zk)/sizeof(*(zk))/16；
//这里用Keil Debug看了，charNum =0x03;
}

麻烦请教一下大佬，如何才能在函数体内求得正确的字符数大小

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

作者: coody_sz 时间: 2023-3-8 09:53
你试试 unsigned char charNum = sizeof(zk)/16，就可以得到字符数。

作者: SuperYh 时间: 2023-3-8 10:56

coody_sz 发表于 2023-3-8 09:53
你试试 unsigned char charNum = sizeof(zk)/16，就可以得到字符数。

这个方法已经试过了，不太管用

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

作者: qsssuv 时间: 2023-3-9 10:54
不可以的，数组经过函数形参传参后，会退化为指针的。得使用sizeof(Mode_Tri)/16

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

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