How to replace all occurrances of a substring with a space in c++ string

Question

I have a function that removes all occurrences of a sub-string from a c++ string. But I want it to insert spaces before or after removing every sub-string. My Function if given below:

    void removeSubstrs(string& s, string& p) {
    string::size_type n = p.length();
    for (string::size_type i = s.find(p);
        i != string::npos;
        i = s.find(p))
        s.erase(i, n);
}

For example if I input "AZAZBLACKAZAZBERRYAZ", I want the output "BLACK BERRY"....

i/p AZAZBLACKAZA.. o/p BLACK BERRY , where does AZ gone ? – udit043 Sep 26 '15 at 08:28 — udit043, Sep 26 '15 at 08:28

Zhr Saghaie · Answer 1 · 2015-09-26T11:05:35.050

1

if what you want is something like this:

assume "-" as space
input: "AZAZBLACKAZAZBERRYAZ" and "AZ"
output: "--BLACK--BERRY-"

then, this may help you:

  void removeSubstrs(string& s, string& p) {
    string::size_type n = p.length();
    for (string::size_type i = s.find(p); i != string::npos; i = s.find(p))
    {
        s.replace(i, n, 1, ' ');
        //OR
        //s.erase(i, n);
        //s.inset(i, ' '); //Add this line
    }
}

edited Sep 26 '15 at 11:05

answered Sep 26 '15 at 08:33

Zhr Saghaie

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You could do `s.replace(i, n, 1, ' ')` instead of `erase/insert`. It might even be more efficient. – Blastfurnace Sep 26 '15 at 10:23
@Blastfurnace: Thanks, I added that to the code! – Zhr Saghaie Sep 26 '15 at 11:06

How to replace all occurrances of a substring with a space in c++ string

1 Answers1