hdoj 2051 Bitset

Bitset

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

 

Author

8600 && xhd

First introduce a function    itoa (i ,num ,10 );

i ---- the number that needs to be converted into a string

num ---- variable to save the string after conversion

10 ---- Convert the base (ie base) of the number. 10 means to convert numbers in base 10. It can also be 2, 8, 16, etc. the base type you like

Return value: pointer

#include<stdio.h>
    #include<stdlib.h>
    int main(){
	int n;
	while(scanf("%d",&n)!=EOF){
		char str[4000];
		itoa (n, str, 2);
		printf("%s\n",str);
	}
	return 0;
    }