find chars/string in string from vector c++ - c++11

Question

I have a vector of strings, and I want to count all 'Ace' in the vector. Right now I can only find one...
int main()
{
std::vector<string> vec;
vec.push_back("Ace of Spades");
vec.push_back("Ace");
string value = "Ace";
int cnt = 0;
auto iter = find_if(begin(vec), end(vec), [&](const string &str)
{
return str.find(value) != str.npos;
});
if(iter == end(vec))
cout << "no found" << endl;
else
{
cout << *iter << endl;
cnt++;
cout << cnt++ << endl;
}
}

Answer 1

You could use std::count_if:
auto cnt = count_if(begin(vec),
end(vec),
[&](const string& str) {
return str.find(value) != std::string::npos;
});
Note that this only counts the number of strings containing "Ace", not the total number of occurrences of "Ace" in the vector's elements.

Answer 2

If you just want to count the number of matching elements, you could use std::count_if.
If you also need to do something with them, it would probably be best to forget about the standard library algorithms and use a ranged for like so:
int count = 0;
for (const auto& element : vec) {
if (element.find(value) != std::string::npos) {
std::cout << element << std::endl;
++count;
}
}
std::cout << count << std::endl;