v('ω')v

hage.c

#include <stdio.h>

int main(void) {
  int x, a, b;
  scanf("%x",&x);
  if (x < 0x20 || 0xDF < x) {
    printf("error: %d\n", x);
    return -1;
  }
  a = (x & 0xE0) >> 5;
  b = x & 0x1F;
  printf("a:%0#4x, b:%0#4x, 0x20*a+b:%0#4x\n", a, b, 0x20*a+b);
}

∠( 'ω')／