求c++编程答案，手写的什么都行

int main()
{
string FirstName,LastName;
char grade;
int age;
cout<<"What's your first name? ";
getline(cin,FirstName);
cout<<"What's your last name? ";
getline(cin,LastName);
cout<<"What's your age? ";
cin>>age;
cout<<"What letter grade do you deserve ";
cin>>grade;
++grade;
cout<<"Name:"<<LastName<<','<<FirstName<<endl;
cout<<"Grade:"<<grade<<endl;
cout<<"Age:"<<age<<endl;
system("pause");
return 0;
}