24 lines
543 B
C++
24 lines
543 B
C++
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// for循环测试: 使用位运算符实现以下条件：判断一个数的二进制表示中有多少个 1
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#include <iostream>
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#include <cmath>
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using namespace std;
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int main()
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{
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int n = 0;
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cout << "请输入一个整数: ";
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cin >> n;
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int count = 0; // 统计 1 的个数
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int temp = 0; // 临时变量
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for (int i = 0; temp < n; i++)
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{
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temp = 1 << i;
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if ((n & temp) == temp)
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count++;
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}
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cout << n << " 的二进制表示中有 " << count << " 个 1" << endl;
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return 0;
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}
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