How to make an end of file output it's data? - c++

Question

this is my first time asking a question so forgive me if I stumble over anything. I have been working on a project for a suspension system for a car. I needed to make 4 functions for the displacement of the car and tire and the velocity of the car and tire. I feel that I structured the code well but it's simply not outputting the final product. The main purpose is to find the maximum of each function. I tried a lot to try and fix it but I can't seem to come up with a solution.
The main point is. I structured a program with four functions which the data file feeds with the information til it ends. When I try to run it nothing but the header is outputted. I am at a lost to how this is.
The data file has four groups ranging from car A to car D organized like so,
Spring Constant of tire, damp constant of dash-pot, mass of wheel, mass of car, start/end times, increment value
The functions themselves are sort of...Hard to swallow. So I would like to share some sections of code where I believe problems are.
Any help/hints/comments would be most appreciated.
csdatafiles>> total_readings;
csdatafiles >> car_name >> spring_constant_tire >> spring_constant_spring
>> damp_constant >> mass_of_tire >> mass_of_car
>> start_time_value >> end_time_value >> increment_time_value;
//Initialize max min
max_displacement_car=displacement_of_car;
max_displacement_tire=displacement_of_tire;
max_velocity_car=velocity_of_car;
max_velocity_tire=velocity_of_tire;
//Output Header
cout << "\nCar Name Max Tire Displace Max Tire Vel Max Car Displace Max Car Vel \n" << endl;
{
//recall functions
velocity_of_tire= old_new_tire_velocity (variables needed);
velocity_of_car=old_new_car_velocity (variables needed);
displacement_of_car= old_new_car_displacement (variables needed);
//check for max
if (displacement_of_car>max_displacement_car)
max_displacement_car=displacement_of_car;
if (displacement_of_tire>max_displacement_tire)
max_displacement_tire=displacement_of_car;
if (velocity_of_car>max_velocity_car)
max_velocity_car=velocity_of_car;
if (velocity_of_tire>max_velocity_tire)
max_velocity_tire=velocity_of_tire;
total_readings++;
//read rest of data
csdatafiles >> spring_constant_tire >> spring_constant_spring
>> damp_constant >> mass_of_tire >> mass_of_car
>> start_time_value >> end_time_value >> increment_time_value;
} while (!csdatafiles.eof());
//Output
cout << car_name << max_displacement_tire << max_velocity_tire << max_displacement_car << max_velocity_car;

Answer 1

Just going off of the code that you posted, it looks like you tried to put a do-while but forgot the do ...
Instead of
do {
//recall functions
//...
//check for max
//...
//read rest of data
//....
} while (!csdatafiles.eof());
You have
{
//recall functions
//...
//check for max
//...
//read rest of data
//....
} while (!csdatafiles.eof());
which is VERY different! Without the do, your code is equivalent to:
{
//recall functions
//...
//check for max
//...
//read rest of data
//....
}
while (!csdatafiles.eof()) {
;
}
As you can see, there is an infinite loop just before the last cout statement, so you never reach it.