【庫函數源碼剖析系列】(4) strlen

strlen:

// strlen
#include <stdio.h>

size_t Strlen(const char *s)
{
	const char *p = NULL;

	for (p = s; *p != '\0'; ++p)
		;
	return p - s;
}

int main(int argc, char **argv)
{
   char buffer[61] = "abc";
   int len = Strlen( buffer );
   printf( "'%s' is %d characters long\n", buffer, len );

   return 0;
}

一直覺得size_t這個類型神乎其神，反正它是無符號整型，具體搞不清，但size_t是有它的用處的，別試圖用int之類的代替它！