十进制数转换为二进制数

#include <iostream>#include <stack>using namespace std;void DTB(int num){if(num<=0) return;stack<char> numstack;while(num>0){numstack.push(num%2);num/=2;}while(!numstack.empty()){cout<<(int)numstack.top();numstack.pop();}cout<<'\n';}void DTB_Recur(int num){if(num<=0) return;if(num==0||num==1)cout<<num;else{DTB_Recur(num/2);cout<<num%2;}}int main(){int n=13;DTB(n);DTB_Recur(n);}