Test if a vector contains a given element

Question

How to check if a vector contains a given value?

Answer 1

1. Making use of the std::count function
Counting the total number of items in the vector with the supplied value is the easiest solution. If the count is more than zero, we've discovered our element. Using the std::count function, this is simple.

#include

#include

#include

main int ()

{

v = 4, 7, 5, 2, 6, 9; std::vector v = 4, 7, 5, 2, 6, 9;

int key = 6; int key = 6; int key = 6; in

if (v.begin(), v.end(), key) (std::count(v.begin(), v.end(), key) {

"Element discovered"; std::cout

}

otherwise

"Element not found"; std::cout

}

0 is returned;

}