#include <iostream>
#include <iostring>
#include <iomanip>
using namespace std;
int main()
{
char reply;
int num1;
int num2;
int num3;
int num4;
cout<<"Welcome to Pat's Fare Calculator"<<endl;
cout<<"Are you driving a vehicle into the ferry?(y/n)"<<endl;
cin>>reply;
cout<<"Is the driver a senior citizen(over 65) or disabled?(y/n)"<<endl;
cin>>reply;
cout<<"How many passengers in your vehicle?(excluding the driver)"<<endl;
cin>>num1;
cout<<"Adults(age 19-64)"<<endl;
cin>>num2;
cout<<"Senior citizens(65 or older)"<<endl;
cin>>num3;
cout<<"Youth(5-18 years old)"<<endl;
cin<<num4;
cout<<"Is your vehicle longer than 7 feet, 6 inches in height?(y/n)"<<endl;
cin<<reply;
what sort of compiler are you using? try using <iostream.h> as he said. or try deleting it and rewrite it. and try checking your [char reply;] hope that help....