2016SDAU课程练习三1015 Problem O

Problem O

Time Limit : 1000/1000ms (Java/Other)   Memory Limit : 32768/32768K (Java/Other)

Total Submission(s) : 98   Accepted Submission(s) : 74

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

1
2
3

 

Sample Output

1
10
11

 

题目大意：

给十进制的数n输出二进制的。

思路：

用个数组记录一下不断求摸2后的值，每次求摸后n除以2。再输出即可​。

ac代码：

#include<iostream>

using namespace std;

int main(){

int n,i,a[90],k;

while(cin>>n)

{i=0;

while(n)

{a[i]=n%2;

n=n/2;

i++;}

for(i=i-1;i>=0;i--)

cout<<a[i];

cout<<endl;

}

return 0;}