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#include 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--)//这一句不懂，求解释 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;} |
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