int size = 4;
int list[4] = {12,3,7,8};
int temp;

cout<<endl;
 int Evens = 0;
    for (int i = 0; i < size; i++){

    if (list[i] % 2 == 0){
     temp = list[i];

     for (int j = i; j > Evens; j--){
     list[j] = list[j - 1];}
     list[Evens] = temp;
     Evens++;
     cout<<list[i];
    }
 }

    for(int i = 0; i < size; i++){
        cout<<list[i];
        cout<<" | ";
     }
 return 0;