如何从堆栈中弹出所有字符串并将它们存储在字符串变量中？

Question

#include <sstream>
#include <stack>
#include <string>
#include<iostream>
using namespace std;

int main()
{
    istringstream iss("abdd hhh |post_exp| a * b / (c + d) ^ f - g |\\post_exp| anndd jjss");
    stack <string> mudassir;
    string subs;
    while (iss >> subs) {
        if (subs == "|post_exp|")
        {
            while (iss >> subs && subs.find("|\\post_exp|") == string::npos)
            {
                mudassir.push(subs);
               
            }
        }
    }

    while (!mudassir.empty()) {
        mudassir.top();
        mudassir.pop();
    }
    cout << endl;

    return 0;
}

/* This code pop all the required strings from the stack. But i want to store those string elements in a final one string variable. How to do it Kindly help.*/

Answer 1

你几乎很好，但在while-loop 中你想构建字符串。这可以通过多种方式完成，我推荐的是：

    std::ostringstream oss;
    while (!mudassir.empty()) {
        oss << mudassir.top();
        mudassir.pop();
    }
    std::cout << oss.str() << std::endl;