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34 lines
587 B
34 lines
587 B
#include <stdio.h>
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unsigned invert(unsigned x, int p, int n);
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void printfbit(unsigned n);
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int main()
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{
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printf("76543210\n\n");
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unsigned c = 'f';
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printfbit(c);
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printfbit(invert(c, 5, 3));
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return 0;
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}
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/* invert: инвертирует n бит из x, начиная с p-й позиции */
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unsigned invert(unsigned x, int p, int n)
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{
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return x ^ (~(~0 << n) << (p+1-n));
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}
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void printfbit(unsigned n)
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{
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for(int i = 7; i >= 0; i--)
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{
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if(n & (1 << i))
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putchar('1');
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else
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putchar('0');
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}
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putchar('\n');
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} |