训练3 习题15

题目：Problem Description

Give you a number on base ten,you should output it on base two.(0 < n < 1000)

 

Input

For each case there is a postive number n on base ten, end of file.

 

Output

For each case output a number on base two.

 

Sample Input

123

 

Sample Output

11011

 

思路：   这是10进制转2进制问题！多了不说了

#include<iostream>
#include<cstdio>


using namespace std;


int main()
{
    int a[15];
int n;
while(scanf("%d",&n)!=EOF)
{
int k=0,i=0,m=0;
// memset(a,0,sizeof(a));
do{

a[i]=n%2;
n=n/2;
i++;
}while(n!=0);


for(int j=i-1;j>=0;j--)
cout<<a[j];


cout<<endl;
}
return 0;
}

感悟：注意细节啊   因为while中的条件  我提交好几次失败！！