合並2個不同長度的向量並事先對其進行排序，而無需使用sort函數

Question

到目前為止，這是我的代碼。 除排序和合並外，其他所有操作均有效。 如何編寫此代碼，使其在合並前進行排序而不使用sort函數？

#include <iostream>
#include <vector>

using namespace std;

int main() {
    vector < string > que1;
    vector < string > que2;
    vector < string > queMerge;
    string input;

    cout << "Enter queues" << endl;
    while(input != "ENDQ"){ //This while loop fills up the first vector with the values until the first "ENDQ" is reached
        cin >> input;
        que1.push_back(input);
    }
    que1.pop_back();//This statement removes the "ENDQ" input from the vector changing the vector size to 1 less

    input = ""; //Sets input to nothing so that it can loop through the second while loop for the second queue
    while(input != "ENDQ"){//This while loop fills up the second vector with the values until the first "ENDQ" is reached
        cin >> input;
        que2.push_back(input);
    }
    que2.pop_back();//This statement removes the "ENDQ" input from the vector changing the vector size to 1 less

這是我開始遇到代碼和排序過程問題的地方。

    int que1count = 0;
    int que2count = 0;
    for (int i = 0; i < (que1.size() + que2.size()); ++i) {
        if(que2.at(que2count) > que1.at(que1count)){
            queMerge.push_back(que2.at(que2count));
            que2count++;
        }
        else{
            queMerge.push_back(que1.at(que1count));
            que1count++;
        }
    }

從這里開始的其他所有工作都很好。

    cout << "que1: " << que1.size() << endl;
    for (int i = 0; i < que1.size(); ++i) {
        cout << que1[i] << endl;
    }
/*
 * The for loop iterates through the first queue and prints out the values indicated at i until the size of the
 * queue is reached
 */

    cout << endl;

    cout << "que2: " << que2.size() << endl;
    for (int i = 0; i < que2.size(); ++i) {
        cout << que2[i] << endl;
    }
/*
 * The for loop iterates through the second queue and prints out the values indicated at i until the size of the
 * queue is reached
 */

    cout << endl;

    cout << "queMerge: " << queMerge.size() << endl;
    for (int i = 0; i < queMerge.size(); ++i) {
        cout << queMerge[i] << endl;
    }
/*
 * The for loop iterates through the queMerge and prints out the values indicated at i until the size of the
 * queue is reached having already been sorted alphabetically earlier in the program
 */

    return (0);
}

Answer 1

要解決超出范圍的錯誤，只需將for循環更改為以下內容，以確保que1count和que2count不會超過其字符串大小：

for (int i = 0; i < (que1.size() + que2.size()) && que2count < que2.size() && que1count < que1.size(); ++i)

現在將編譯。 但是，您的合並循環仍未達到您的預期目的。 也嘗試對que1和que2使用某些矢量功能。 您現在僅對queMerge使用矢量功能。

這可能會有所幫助： http : //www.cplusplus.com/forum/beginner/98971/