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;
};count occurrences of character in string c++
std::string s = "a_b_c";
size_t n = std::count(s.begin(), s.end(), '_'); // n=2Copyright © 2021 Codeinu
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