String массив, ввод и вывод элементов массива

#include<iostream>
#include<string>
using namespace std;
int main()
{
string FirstName;
cout<<"What is your first name?\t";
getline(cin,FirstName);
string LastName;
cout<<"What is your last name??\t";
getline(cin,LastName);
string Grade="ABCDE";
for(int i=0; i<5; i++)
    cout<<Grade[i];
cout<<"\nWhat letter grade do you deserve?\t";
int j=0;
cin>>Grade;
for(int i=0; i<5; i++)
    cout<<Grade[i];
int age;
cout<<"\nWhat is your age?\t";
cin>>age;
cout<<"Name: "<<LastName<<", "<<FirstName<<"\n"<<"Grade: "<<Grade<<"\nAge: "<<age;
}

#include<iostream>
#include<string>
using namespace std;
int main()
{
    string FirstName;
    cout<<"What is your first name?\t";
    getline(cin,FirstName);
    string LastName;
    cout<<"What is your last name??\t";
    getline(cin,LastName);
    string Grade="ABCDE";
 
    for(int i=0; i<5; i++)
        cout<<Grade[i];
 
    cout<<"\nWhat letter grade do you deserve?\t";
    int j=0;
    string val = "";
    cin>>val;
    if (Grade.find(val) != std::string::npos) 
        j = Grade.find(val);
    if (j == Grade.size() - 1) --j;
 
    int age;
    cout<<"\nWhat is your age?\t";
    cin>>age;
 
    cout<<"Name: "<<LastName<<", "<<FirstName<<"\n"<<"Grade: "<<Grade[j+1]<<"\nAge: "<<age;
    system("pause>>null");
}