#include "stdlib.h" #define NULL 0x00 int main(void) { const char *postest = "ABCDEFabcdef0123456789"; const char *negtest = "GHIJKLMNOPQRSTUVWXYZghijklmnopqrstuvwxyz~!@#$%^&*()_+{}|[]\\:\";'<>?,./`/*-."; char *ptr = NULL; for ( ptr = (char *)postest; *ptr != '\0' ; ptr++ ) { if ( isxdigit((int)*ptr) != 1 ) return (int)(ptr - postest); } for ( ptr = (char *)negtest; *ptr != '\0' ; ptr++ ) { if ( isxdigit((int)*ptr) != 0 ) return (int)(100 + (ptr - negtest)); } return 0; }