数制转换

#include<stdio.h>
main()
{
int x;

printf("Inout number:");
scanf("%d",&x);
printf("number of decimal form: %d\n",x);
printf("   it's binary form: ");
printb(x,sizeof(int)*8);
putchar('\n');
}
printb(x,n)

int x,n;
{
if(n > 0)
{
putchar('0' + ((unsigned)(x & (1 << (n-1))) >> (n-1)));
printb(x,n-1);
}
}