1 char _hex_value[256]; 2 3 void hex_init()4 hex_init () 5 { 6 int i; 7 for (i = 0; i < 256; i++) 8 _hex_value[i] = 99; 9 for (i = 0; i < 10; i++) 10 _hex_value['0' + i] = i; 11 } 12