如何反转std :: string? [英] How to reverse an std::string?

问题描述

当我以二进制数读取字符串时，我试图弄清楚如何反转字符串 temp

Im trying to figure out how to reverse the string temp when I have the string read in binary numbers

istream& operator >>(istream& dat1d, binary& b1)    
{              
    string temp; 

    dat1d >> temp;    
}

推荐答案

我不确定你所说的包含二进制数的字符串是什么意思.但是要反转字符串(或任何与 STL 兼容的容器)，您可以使用 std::reverse().std::reverse() 在原地运行，因此您可能需要先复制字符串:

I'm not sure what you mean by a string that contains binary numbers. But for reversing a string (or any STL-compatible container), you can use std::reverse(). std::reverse() operates in place, so you may want to make a copy of the string first:

#include <algorithm>
#include <iostream>
#include <string>

int main()
{
    std::string foo("foo");
    std::string copy(foo);
    std::cout << foo << '
' << copy << '
';

    std::reverse(copy.begin(), copy.end());
    std::cout << foo << '
' << copy << '
';
}

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