Error: 'reverse' was not declared in this scope

Question

我创建了一个程序来反转句子：

#include <iostream>
#include <string>   

using namespace std;

int main()
{
    string sentence;
    string reversedSentence;
    int i2 = 0;

    cout << "Type in a sentence..." << endl;
    getline(cin, sentence);

    reversedSentence = sentence;
    reverse(reversedSentence.begin(), reversedSentence.end());

    cout << sentence << endl;
}

但是当我尝试用 MinGW G++ 编译它时，发生了这种情况：

SentenceReverser.cpp: In function 'int main()':
SentenceReverser.cpp:16:5: error: 'reverse' was not declared in this scope
   16 |     reverse(reversedSentence.begin(), reversedSentence.end());
      |     ^~~~~~~

我不知道我做错了什么。帮忙？

Answer 1

std::reverse()定义在algorithmheader中。包括：

#include <algorithm>

此外，avoid using namespace std;。

Error: 'reverse' was not declared in this scope

Error: 'reverse' was not declared in this scope

c++

reverse

mingw

g++

std