十进制转化为二进制

#include <stdio.h>


#define BASE 3


int main1()
{
int a = 12;

scanf ("%d", &a);

int s[10]= {0};
int i = 0;
while (a)
{
s[i++] = a % 2;
a /= 2;
}

for (i = i-1; i >= 0; i--)
{
printf ("%d", s[i]);
}

printf ("\n");

return 0;
}






void tran(int n)
{
if (n == 0)
return;

// printf ("%d", n%2);
tran(n/BASE);
printf ("%d", n%BASE);
return;
}


int main()
{
int a = 12;

tran(12);
printf ("\n");

return 0;
}