我遇到了一個例子,它由Kernighan & Ritchie以「C語言編程」返回一個結構體。返回指向結構體的指針
/* binsearch: find word in tab[0]...tab[n-1] */
struct key *binsearch(char *word, struct key *tab, int n)
{
int cond;
struct key *low = &tab[0];
struct key *high = &tab[n];
struct key *mid;
while (low < high) {
mid = low + (high-low)/2;
if ((cond = strcmp(word, mid->word)) < 0)
high = mid;
else if (cond > 0)
low = mid + 1;
else
return mid;
}
return NULL;
}
看來,該函數正在返回一個指向函數中的本地變量的指針;這不是一個返回懸掛指針的情況嗎?