78 lines
2.9 KiB
C++
78 lines
2.9 KiB
C++
#include <bits/stdc++.h>
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using namespace std;
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//整数转二进制
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string IntToBit(int x) {
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string s = bitset<32>(x).to_string(), s2;
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int i = 0, len = s.length();
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while (s[i] == '0') i++;
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while (i <= len) s2 += s[i], i++;
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return s2;
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}
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//二进制字符串转整数
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int BitStrToInt(string str) {
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string bitval5(str);
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bitset<32> b5(bitval5);
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return b5.to_ulong();
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}
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int main() {
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int x = BitStrToInt("101101");
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printf("1.去掉最后一位： 例：(101101->10110) %s\n", IntToBit((x >> 1)).c_str());
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printf("2.在最后加一个0： 例：(101101->1011010) %s\n", IntToBit((x << 1)).c_str());
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printf("3.在最后加一个1： 例：(101101->1011011) %s\n", IntToBit((x << 1) + 1).c_str());
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x = BitStrToInt("101100");
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printf("4.把最后一位变成1： 例：(101100->101101) %s\n", IntToBit(x | 1).c_str());
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x = BitStrToInt("101101");
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printf("5.把最后一位变成0： 例：(101101->101100) %s\n", IntToBit((x | 1) - 1).c_str());
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printf("6.把最后一位取反： 例：(101101->101100) %s\n", IntToBit((x ^ 1)).c_str());
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int k = 3;
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x = BitStrToInt("101001");
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printf("7.把右数第k位变成1：例：(101001->101101,k=3) %s\n", IntToBit((x | (1 << (k - 1)))).c_str());
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x = BitStrToInt("101001");
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printf("8.把右数第k位变成0：例：(101001->101001,k=3) %s\n", IntToBit((x & ~(1 << (k - 1)))).c_str());
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x = BitStrToInt("101001");
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printf("9.把右数第k位取反：例：(101001->101101,k=3) %s\n", IntToBit((x ^ (1 << (k - 1)))).c_str());
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x = BitStrToInt("1101101");
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printf("10.取末三位：例：(1101101->101) %s\n", IntToBit(x & 7).c_str());
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x = BitStrToInt("1101101");
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k = 4;
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printf("11.取右数第k位：例：(1101101->1,k=4) %s\n", IntToBit(x >> (k - 1) & 1).c_str());
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x = BitStrToInt("101001");
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k = 4;
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printf("12.把末k位变成1：例：(101001->101111,k=4) %s\n", IntToBit(x | ((1 << k) - 1)).c_str());
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x = BitStrToInt("101001");
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k = 4;
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printf("13.把末k位取反：例：(101001->100110,k=4) %s\n", IntToBit(x ^ ((1 << k) - 1)).c_str());
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x = BitStrToInt("100101111");
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printf("14.把右边连续的1变成0：例：(100101111->100100000) %s\n", IntToBit(x & (x + 1)).c_str());
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x = BitStrToInt("100101111");
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printf("15.把右起第一个0变成1：例：(100101111->100111111) %s\n", IntToBit(x | (x + 1)).c_str());
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x = BitStrToInt("100101111");
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printf("16.把右边连续的0变成1：例：(11011000->11011111) %s\n", IntToBit(x | (x - 1)).c_str());
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x = BitStrToInt("100101111");
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printf("17.取右边连续的1：例：(100101111->1111) %s\n", IntToBit((x ^ (x + 1)) >> 1).c_str());
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x = BitStrToInt("100101000");
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printf("18.去掉右起第一个1的左边：例：(100101000->1000) %s\n", IntToBit(x & (x ^ (x - 1))).c_str());
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return 0;
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}
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