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#include <stdio.h>
#include <stdlib.h>
#include "node.h"
void main() {
struct _node *root = NULL;
int val;
for (int i = 0; i < 10; i++) {
val = rand() % 90 + 10;
printf("%5d", val);
root = add_val(root, val);
}
printf("\n");
show_node(root);
printf("\n");
free_node(root);
}