Drafe

#include<iostream>
using namespace std;

//Write your stack here



int main(){

  //Create two stack, one for float number, one for operator.
  
  //Read the file into some buffer.
  
  
  //Do infix to prefix.
  for(int i=strlen(buf)-l;i>=0;i--){
    // if it is a float number, push to float stack.
    
    // if it is a operator, match the operator's priority
    
  }
  
  //Do infix to postfix.
  
  
}