Thread: Wha'ts wrong

I can't seem to find the problem with this program. I've been looking over it for a long time, and i just can't find the error. It comes up with around 8 errors, but i think only one is causing the rest or the errors.

Code:

#include <stdlib.h>
#include <stdio.h>

struct tree 
{
	char info;
	struct tree *left;
	struct tree *right;
};

struct tree *root;
struct tree *stree(struct tree *root, struct tree *r, char info);
void print_tree(struct tree *root, int 1);

void main(void)
{
	char s[80];
	root = NULL;

	do
	{
		printf("Enter a letter: ");
		gets(s);
		if(!root) root = stree(root, root, *s);
		else stree(root, root, *s);
	}while(*s);
	print_tree(root, NULL);
}

struct tree *stree(struct tree *root, struct tree *r, char info)
	{
		if(!r)
		{
			r = (struct tree *) malloc(sizeof(struct tree));
			if(!r)
			{
				printf("Out of Memory\n");
				exit(0);
			}
			r->left = NULL;
			r->right = NULL;
			r->info = info;
			if(!root) return r;
			if(info<root->info) root->left = r;
			else root->right = r;
			return r;
		}
		if(info<r->info) stree(r, r->left, info);
		else
			stree(r, r->right, info);
	}
void print_tree(struct tree *r, int 1)
	{
		int i;
		if (!r)return;

		print_tree(r->right, 1+1);
		for(i=0; i<1; ++i) printf(" ");
		printf("%c\n", r->info);
		print_tree(r->left, 1+1);
	}