2016-10-26 09:33:25 |人围观 |
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1 #include
2 void my_strcpy(const char *src, char *dst)
3 {
4 int ch;
5 __asm
6 {
7 loop:
8 LDRB ch, [src], #1
9 STRB ch, [dst], #1
10 CMP ch, #0
11 BNE loop
12 }
13 }
14 int main(void)
15 {
16 const char *a = "Hello world!";
17 char b[20];
18 my_strcpy (a,b);
19 printf("Original string: '%s'/n", a);
20 printf("Copied string: '%s'/n", b);
21 return 0;
22 }
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