替换STL字符串中的换行符

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

int main() {
    std::string str = "This is a\nstring with\nnewlines.";
    std::replace(str.begin(), str.end(), '\n', ' ');
    std::cout<< str<< std::endl;
    return 0;
}

This is a string with newlines.