백준
[1991] 트리 순회
by Jcoder
2018. 10. 20.
#include <iostream>
using namespace std;
typedef struct node
{
char left;
char right;
}node;
node arr[27];
void preorder(char c)
{
if (c == '.')
return;
else
{
cout << c;
preorder(arr[c].left);
preorder(arr[c].right);
}
}
void inorder(char c)
{
if (c == '.')
return;
else
{
inorder(arr[c].left);
cout << c;
inorder(arr[c].right);
}
}
void postorder(char c)
{
if (c == '.')
return;
else
{
postorder(arr[c].left);
postorder(arr[c].right);
cout << c;
}
}
int main()
{
int n, i;
char c1, c2, c3;
cin >> n;
for (i = 0; i < n; i++)
{
cin >> c1 >> c2 >> c3;
arr[c1].left = c2;
arr[c1].right = c3;
}
preorder('A'); cout << "\n";
inorder('A'); cout << "\n";
postorder('A'); cout << "\n";
}