求10转2进制C 算法

#include <stdio.h>
void main()
{
int a=0,i=1,x,y;
printf("请输入要转化的数字：");
scanf("%d",&x);
while(x!=0)
{
y=x%2;
x=x/2;
a+=y*i;
i=i*10;
}
printf("你输入的数的二进制为：%d\n",a);
}
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int n;
scanf("enter one num:%d", &n);
int i = 0;
char s[8 * sizeof(int) + 1];

while (n > 1) {
s[i++] = n % 2 + '0';
n /= 2;
}
s[i] = '\0';