error: no match for 'operator<'} and 'void')|

This is my code. I have gone through it multiple times, making many changes still same error.

#include <iostream>

using namespace std;

void checkAge(int age){
    if(age >= 18){
        cout<< "As your age is above 18, you are eligible to vote. \n";
    }
    else{
        cout<< "As your age is below 18, you aren't eligible to vote. \n";
    }
}
int main()
{
    int age;
        cout << "Enter your age. \n";
       cin >> age;
       cout << checkAge(age);


    return 0;
}