【C語言】類比實現memmove函數（考慮記憶體重疊）

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//類比實現memmove函數（考慮記憶體重疊）#include <stdio.h>#include <assert.h>#include <string.h>void * memmove(void * dst, const void * src, int count){void * ret = dst;assert(dst);assert(src);if (dst <= src || (char *)dst >= ((char *)src + count))   //正常情況不發生重疊，從低到高{while (count--) {*(char *)dst = *(char *)src;dst = (char *)dst + 1;src = (char *)src + 1;}}else                                                      //發生重疊，從低到高{dst = (char *)dst + count - 1;src = (char *)src + count - 1;while (count--) {*(char *)dst = *(char *)src;dst = (char *)dst - 1;src = (char *)src - 1;}}return ret;}int main(){char p[] = "hello!";char *q = "world";memmove(p, q,strlen(q)+1 );printf("%s\n", p);return 0;}

【C語言】類比實現memmove函數（考慮記憶體重疊）