栈实现十进制转二进制

#include<stdio.h>
#define maxsize 20
typedef struct s {
	int data[maxsize];
	int top;
}SqStack;
int InitStack(SqStack& S1) {
	S1.top = -1;
	return 1;
}
int push(SqStack& S, int x) {
	S.data[++S.top] = x;
	return 1;
}
int pop(SqStack& S, int& x) {

	x = S.data[S.top--];
	return 1;
}
int isEmpty(SqStack S) {
	if (S.top == -1) {
		return 1;
	}
	else
	{
		return 0;
	}
}
int main() {
	int n;
	scanf_s("%d", &n);
	SqStack S;
	InitStack(S);
	int a ;
	while(n) {
		push(S, n % 2);
		n /= 2;
	}
	while (!isEmpty(S)) {
		pop(S, a);
		printf("%d", a);
	}
 }