toupper(int c)1*37da2899SCharles.Forsythtoupper(int c) 2*37da2899SCharles.Forsyth { 3*37da2899SCharles.Forsyth 4*37da2899SCharles.Forsyth if(c < 'a' || c > 'z') 5*37da2899SCharles.Forsyth return c; 6*37da2899SCharles.Forsyth return (c-'a'+'A'); 7*37da2899SCharles.Forsyth } 8*37da2899SCharles.Forsyth tolower(int c)9*37da2899SCharles.Forsythtolower(int c) 10*37da2899SCharles.Forsyth { 11*37da2899SCharles.Forsyth 12*37da2899SCharles.Forsyth if(c < 'A' || c > 'Z') 13*37da2899SCharles.Forsyth return c; 14*37da2899SCharles.Forsyth return (c-'A'+'a'); 15*37da2899SCharles.Forsyth } 16*37da2899SCharles.Forsyth 17