count occurrences of character in string c++
std::string s = "a_b_c";
size_t n = std::count(s.begin(), s.end(), '_'); // n=2count occurrences of character in string c++
std::string s = "a_b_c";
size_t n = std::count(s.begin(), s.end(), '_'); // n=2cpp string find all occurence
string str,sub; // str is string to search, sub is the substring to search for
vector<size_t> 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);
}Copyright © 2021 Codeinu
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