text: #include "func_tree.h"
  #include "interface.h"
  
  #include <stdio.h>
  #include <string.h>
  
  int main()
  {
  	char buff[128];
  	char* newLine;
  	Operation *op;
  	Function *func;
  
  	scanf(" %s", buff);
  	fgets(buff, sizeof(buff), stdin);
  	newLine = strchr(buff,'\n');
  	if(newLine!= NULL)
  		*newLine = '\0';
  
  	if(strchr(buff, '=') == NULL)
  	{
  		op = newOpTree(buff);
  		print_tree(op);
  	}
  	else
  	{
  		func = mFunction(buff);
  		print_function(func);
  	}
  
  	return 0;
  }
  