我想编写一个字符串列表。用户可以添加到列表中或从列表中删除以及显示当前列表。C++遍历一个向量并删除匹配的字符串
显示列表和添加到列表工作正常,但我不知道如何通过遍历列表中找到匹配来删除用户的字符串。
我该如何更改我的代码来解决这个问题? 看,如果(答案== 3)
// InClassAssignment-FavouriteGameList.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <string>
#include <cstdlib>
#include <iostream>
#include <vector>
#include <algorithm>
#include <ctime>
#include <cctype>
using namespace std;
int _tmain(int argc, _TCHAR* argv[])
{
vector <string> gameList;
int answer = 0;
bool cont = true;
int size = 0;
vector<string>::iterator iter;
string addToList;
string removeFromList;
cout << "\tGame List" << endl;
while (cont)
{
cout << "--------------------------------------------" << endl;
cout << "\nWhat do you want to do?";
cout << "\n1 - Display List";
cout << "\n2 - Add to List";
cout << "\n3 - Remove from List";
cout << "\n4 - End program" << endl << "Selection: ";
cin >> answer;
cout << endl;
if (answer == 1)
{
cout << "List: ";
for (iter = gameList.begin(); iter != gameList.end(); ++iter)
{
if (iter != gameList.end() - 1)
cout << *iter << ", ";
else
cout << *iter << endl;
}
}
else if (answer == 2)
{
cout << "Type in a game to add: ";
cin >> addToList;
gameList.push_back(addToList);
cout << "\nAdded (" << addToList << ") to your list." << endl;
}
else if (answer == 3)
{
//display list
cout << "List: ";
for (iter = gameList.begin(); iter != gameList.end(); ++iter)
{
if (iter != gameList.end() - 1)
cout << *iter << ", ";
else
cout << *iter << "\n" << endl;
}
//ask which one to remove
cout << "Which game should be removed?: ";
cin >> removeFromList;
//loop/iterate through the list to find a match and erase it
for (iter = gameList.begin(); iter != gameList.end(); ++iter)
{
if()
cout << "\nRemoved (" << removeFromList << ")" << endl;
else
cout << "\nGame not found" << endl;
}
}
else
{
cont = false;
}
}
cout << "\nThanks for using the program!\n" << endl;
return 0;
}
注意:您不需要if。擦除是有效的范围[开始(),结束()] – 2015-02-11 20:31:51
它的工作感谢,唯一的事情我很困惑它为什么使用自动而不是写它呢? – Will 2015-02-11 20:35:47
@DieterLücking实际上,对于'erase'的单一参数形式来说,检查是必需的,因为参数需要可解引用,而'end()'不需要。它在序列容器要求表中的某处提到。该要求也列在cppreference上(http://en.cppreference.com/w/cpp/container/vector/erase)。 – Praetorian 2015-02-11 20:39:36