find all occurrences of a substring in a string c++

#include <string>
#include <iostream>

using namespace std;

int main()
{
    string s("hello hello");
    int count = 0;
    size_t nPos = s.find("hello", 0); // first occurrence
    while(nPos != string::npos)
    {
        count++;
        nPos = s.find("hello", nPos + 1);
    }

    cout << count;
};

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Hosein caney 90 points

                                    std::string parentstring = &quot;Hello Agnosticdev, I love Tutorials&quot;;
std::string substring = &quot;Agnosticdev&quot;;
auto index = parentstring.find(substring);

Thank you! 1

4 (1 Votes)

0

3.56

9

R.Moon 90 points

                                    string str,sub; // str is string to search, sub is the substring to search for

vector&lt;size_t&gt; positions; // holds all the positions that sub occurs within str

size_t pos = str.find(sub, 0);
while(pos != string::npos)
{
    positions.push_back(pos);
    pos = str.find(sub,pos+1);
}

Thank you! 9

3.56 (9 Votes)

0

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