// 2185. Counting Words With a Given Prefix #include "leetcode.h" /* * you are given an array of strings 'words' and a string 'pref'. return the * number of strings in 'words' that contain 'pref' as a prefix. a prefix of a * string 's' is any leading contiguous substring of 's'. */ int prefixCount(char **words, int wordsSize, char *pref) { int cnt = 0, n = strlen(pref); for (int i = 0; i < wordsSize; i++) if (!strncmp(words[i], pref, n)) cnt++; return cnt; } int main() { char *w1[] = {"pay", "attention", "practice", "attend"}, *p1 = "at"; char *w2[] = {"leetcode", "win", "loops", "success"}, *p2 = "code"; printf("%d\n", prefixCount((char **)w1, ARRAY_SIZE(w1), p1)); // expect: 2 printf("%d\n", prefixCount((char **)w2, ARRAY_SIZE(w2), p2)); // expect: 0 }