check if element in vector ++ code example
Example 1: if vector contains value c++
#include <algorithm>
if(std::find(v.begin(), v.end(), x) != v.end()) {
/* v contains x */
} else {
/* v does not contain x */
}
Example 2: check if element in std vector
#include <iostream>
#include <vector>
#include <algorithm>
int main()
{
std::vector<int> v = { 4, 7, 5, 2, 6, 9 };
int key = 6;
if (std::count(v.begin(), v.end(), key))
std::cout << "Element found";
else
std::cout << "Element not found";
return 0;
}