HDU1196进制转换
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Lowest Bit
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 12485 Accepted Submission(s): 9114Problem Description
Given an positive integer A (1 <= A <= 100), output the lowest bit of A.For example, given A = 26, we can write A in binary form as 11010, so the lowest bit of A is 10, so the output should be 2.
Another example goes like this: given A = 88, we can write A in binary form as 1011000, so the lowest bit of A is 1000, so the output should be 8.
Input
Each line of input contains only an integer A (1 <= A <= 100). A line containing “0” indicates the end of input, and this line is not a part of the input data.Output
For each A in the input, output a line containing only its lowest bit.Sample Input
26
88
0Sample Output
2
8
思路
先转化为二进制,找到从右往左第一个1处,然后求的这个二进制的十进制数
代码
#include <iostream>#include <stdio.h>using namespace std;int main(){ int n; while(cin>>n) { int a[100]={0}; int j=0; int i; int w=1; int number=0; if(n==0) break; for(i = 16; i >= 0; i--) //十进制转二进制 { if(n & (1 << i)) a[j]=1; else a[j]=0; ++j; } for(i=j-1;i>=0;i--) { if(a[i]==1) break; } for(int m=j-1;m>=i;m--)//二进制转十进制 { number += a[m]*w; w*=2; } cout<<number<<endl; } return 0;}
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