?? strspn.c
字號:
/* * strspn - find length of initial segment of s consisting entirely * of characters from accept */#include <string.h>size_tstrspn(const char *s1, const char *s2){ register const char *sscan; register const char *ascan; register size_t count; count = 0; for (sscan = s1; *sscan != '\0'; sscan++) { for (ascan = s2; *ascan != '\0'; ascan++) if (*sscan == *ascan) break; if (*ascan == '\0') return count; count++; } return count;}
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