Напишите программу на C++. Только начал учить и не смог разобраться

#include "iostream"
using namespace std;
int main(){
int a,b,c; cout<<"a b c: "; cin>>a>>b>>c;
cout<<(a+b+c)/3.<<endl; cin.get(); cin.get();}

бесплатно?

#include <iostream>
using namespace std;


int main()
{
short unsigned int score;
short unsigned int score2;
short unsigned int score3;

cout << "Score Attemp 1:";
cin >> score;
cout << "Score Attemp 2:";
cin >> score2;
cout << "Score Attemp 3:";
cin >> score3;
cout << "\nYour Average Score:" << (score + score2 + score3) / 3 << endl;

return 0;
}

#include
using namespace std;
int main()
{
int kills,victories,assistance;
kills = 10;
victories = 5;
assistance = 3;

cout << "Points: " << (kills + victories + assistance) / 3 << " " << endl;
return 0;
}

// программа, которая принимает у пользователя три суммы очков за разные попытки в игре и выводит среднее значение на основе трёх.

#include<iostream>
using namespace std;

int main()
{
unsigned int scoreone = 5680;
float scoretwo = 5678.98;
float scorethree = 6001.765;

scoreone += 150;
scoretwo += 113.43;
scorethree += 111.77;

cout << "scoreone: " << scoreone << endl;
cout << "scoretwo: " << scoretwo << endl;
cout << "scorethree: " << scorethree << endl;

float average = (scoreone + scoretwo + scorethree) / 3;
cout << "\naverage: " << average << endl;

return 0;


}