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#include <stdio.h>
#include <string>
#include <iostream>
#include <stdlib.h>
#include <vector>
#include <stack>
using namespace std;
//ÉèÖÃÔËËã·ûÓÅÏȼ¶µÄËã·¨
int Priority(const string opera) // ÔËËã·ûÓÅÏȼ¶
{
if(opera=="+"||opera=="-")
{
return (1);
}
else if(opera=="*"||opera=="/")
{
return (2);
}
else
{
return (0);
}
}
void MiddlefixToPostfix(vector<string> &ivec1,vector<string> &ivec2)
//ÖÐ׺±í´ïʽµ½ºó׺±í´ïʽµÄת»»Ëã·¨,ivec2Öдæ·ÅµÄÊÇÖÐ׺±í´ïʽ£¬½«Æäת»»Îªºó׺±í´ïʽÐÎʽ´æ·Åµ½ivec2ÖС£
{
//¶¨ÒåÒ»¸ö´æ·Å²Ù×÷·ûµÄÕ»¶ÔÏó¡£
stack<string> operatorstk;
for(vector<string>::size_type i=0;i!=ivec2.size();++i)
{
if(ivec2[i]=="(")
{
operatorstk.push(ivec2[i]);
}
else if(ivec2[i]=="+"||ivec2[i]=="-"||ivec2[i]=="*"||ivec2[i]=="/")
{
if(operatorstk.empty())
{
operatorstk.push(ivec2[i]);
}
else
{
if(Priority(ivec2[i])<=Priority(operatorstk.top()))
{
while( operatorstk.empty()==false && operatorstk.top()!="(" )
{
ivec1.push_back(operatorstk.top());
operatorstk.pop();
}
operatorstk.push(ivec2[i]);
}
else
{
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