Replace a character/sequence of characters in a C++ std::string with another sequence of characters [duplicate]

Question

I want to replace all occurrences of & in my std::string with &. Here, is the code snippet codelink

#include <algorithm>
#include <string>
#include <iostream>
int main()
{
    std::string st = "hello guys how are you & so good & that &";
    std::replace(st.begin(), st.end(), "&", "&amp;");
    std::cout << "str is" << st;
    return 1;
}

It shows error that std::replace can't replace string, but it only works with characters. I know i can still have a logic to get my work done, but is there any clean C++ way of doing this ? Is there any inbuilt function ?

std::string::replace. You should be familiar with cppreference by now... — StoryTeller - Unslander Monica
– StoryTeller - Unslander Monica, Commented Oct 22, 2017 at 17:21

wally · Accepted Answer · 2017-10-22 17:29:26Z

5

A regex replace could make this easier:

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

int main()
{
    std::string st = "hello guys how are you & so good & that &";
    st = std::regex_replace(st, std::regex("\\&"), "&amp;");
    std::cout << "str is" << st;
    return 1;
}

answered Oct 22, 2017 at 17:29

wally

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1 Comment

codeLover Over a year ago

Thanks, this helped :) Upvoted & accepted as answer :)

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