1 #include "case.h" 2 case_lowers(char * s)3 void case_lowers(char *s) { 4 unsigned char x; 5 for (;;) { 6 if (!(x=*s)) break; 7 if ((x -= 'A') <= 'Z' - 'A') *s = x + 'a'; 8 ++s; 9 } 10 } 11