对 C++ 字符串的字符进行排序

Sorting Characters Of A C++ String

提问by gprime

If i have a string is there a built in function to sort the characters or would I have to write my own?

如果我有一个字符串，是否有内置函数来对字符进行排序，还是必须自己编写？

for example:

例如：

string word = "dabc";

I would want to change it so that:

我想改变它，以便：

string sortedWord = "abcd";

Maybe using char is a better option? How would I do this in C++?

也许使用 char 是更好的选择？我将如何在 C++ 中做到这一点？

回答by R. Martinho Fernandes

There is a sorting algorithmin the standard library, in the header <algorithm>. It sorts inplace, so if you do the following, your original word will become sorted.

标准库中有一个排序算法，在 header 中<algorithm>。它就地排序，因此如果您执行以下操作，您的原始单词将被排序。

std::sort(word.begin(), word.end());

If you don't want to lose the original, make a copy first.

如果您不想丢失原件，请先制作副本。

std::string sortedWord = word;
std::sort(sortedWord.begin(), sortedWord.end());

回答by dreamlax

std::sort(str.begin(), str.end());

See here

看这里

回答by abe312

You have to include sortfunction which is in algorithmheader file which is a standard template libraryin c++.

您必须包含头文件中的sort函数，该函数是C++ 中algorithm的标准模板库。

Usage: std::sort(str.begin(), str.end());

用法： std::sort(str.begin(), str.end());

#include <iostream>
#include <algorithm>  // this header is required for std::sort to work
int main()
{
    std::string s = "dacb";
    std::sort(s.begin(), s.end());
    std::cout << s << std::endl;

    return 0;
}

OUTPUT:

输出：

abcd

abcd

回答by rashedcs

You can use sort()function. sort() exists in algorithmheader file

您可以使用sort()函数。sort() 存在于算法头文件中

        #include<bits/stdc++.h>
        using namespace std;


        int main()
        {
            ios::sync_with_stdio(false);
            string str = "sharlock";

            sort(str.begin(), str.end());
            cout<<str<<endl;

            return 0;
        }

Output:

输出：

achklors

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