#include?<stdio.h> int?count_bits(unsigned?x) { int?count?=?0; while?(x)?{ if?(x?&?1U) count++; x?>>=?1; } return?count; } int?int_bits(void) { return?(count_bits(~0U)); } void?print_bits(unsigned?x) { int?i; for?(i?=?int_bits()?-?1;?i?>=?0;?i--)//這一句不懂，求解釋 putchar(((x?>>?i)?&?1U)???'1'?:?'0'); return; } int?main(void) { unsigned?na,?nb; puts("please?enter?two?integer"); printf("integer?A:?"); scanf("%u",?&na); printf("integer?B:?"); scanf("%u",?&nb); printf("\n?A? =?"); print_bits(na); printf("\n?B =?"); print_bits(nb); printf("\n?A?&?B =?"); print_bits(na?&?nb); printf("\n?A?|?B? =?"); print_bits(na?|?nb); printf("\n?A?^?B? =?"); print_bits(na?^?nb); printf("\n?~A =?"); print_bits(~na); printf("\n?~B =?"); print_bits(~nb); putchar('\n'); return?0; }