c program to Create a Tree

C Program

#include <stdio.h>
#include <malloc.h>
#include <stdio.h>
#include <conio.h>
typedef struct TREE {
	int data;
	struct TREE *left;
	struct TREE *right;
}
TREE;
int main() {
	int data,depth;
	TREE *tree =NULL;
	TREE *InsertTree(int data,TREE *p);
	TREE *PrintTreeTriangle(TREE *tree, int level);
	int TreeDepth(TREE *tree,int *depth,int level);
	clrscr();
	while(1) {
		printf("\nKey to insert|");
		scanf("%d", &data);
		if (data==0)
			  break;
		tree =InsertTree(data,tree);
		printf("\n Tree Display;\n");
		PrintTreeTriangle(tree,1);
		depth=0;
		TreeDepth(tree,&depth,0);
		printf("\nTree Depth =%d\n",depth);
	}
	return(0);
}
TREE *InsertTree(int data,TREE *p) {
	if(!p) {
		p=(TREE*)malloc(sizeof(TREE));
		p->data=data;
		p->left=NULL;
		p->right=NULL;
		return(p);
	}
	if(data < p->data)
		p->left=InsertTree(data,p->left); else
		if(data > p->data)
		p->right=InsertTree(data,p->right);
	return(p);
}
TREE *PrintTreeTriangle(TREE *tree, int level) {
	int i;
	if(tree) {
		PrintTreeTriangle(tree->right,level+1);
		printf("\n\n");
		for (i=0;i<level;i++)
				printf("       ");
		printf("%d",tree->data);
		PrintTreeTriangle(tree->left,level+1);
	}
	return(NULL);
}
int TreeDepth(TREE *tree,int *depth,int level) {
	if(tree) {
		if (level>*depth)
		     *depth=level;
		TreeDepth(tree->left,depth,level+1);
		TreeDepth(tree->right,depth,level+1);
	}
	return(0);
}