Reading in input to construct an object - c++

Question

I am trying to read a string line for line down a .txt file in order to initiate an array of objects using a constructor that takes a string.
The text file is written like
TransAm
Mustang
Corvette
I feel like my loop is not iterating the information I want to be set correctly. Is there an easy way of accomplishing this?
main.cc
#include <string>
#include <iostream>
#include "Car.cc"
#include <fstream>
using namespace std;
int main()
{
Car cars[3];
string STRING;
ifstream infile;
infile.open("cars.txt");
// THIS IS HOW IT'S ACHIEVED USING FOR-LOOP - Sam
for(int i = 0; i<3 && infile;++i){
getline(infile,STRING);
cars[i].setName(STRING);
}
/* THIS IS WHAT I HAD
while(!infile)
{
getline(infile,STRING);
for(int i = 0; i<sizeof(cars);i++){
cars[i].setName(STRING);
}
}
*/
infile.close();
for(int j = 0;j<sizeof(cars);j++){
cars[j].print();
}
}
Car.h
#include <string>
using namespace std;
class Car{
public:
Car();
Car(string);
string getName();
void setName(string);
void print();
private:
string name;
};
Car.cc
#include <string>
#include "Car.h"
using namespace std;
Car::Car()
{
}
Car::Car(string s)
{
setName(s);
}
void Car::setName(string s)
{
name = s;
}
string Car::getName()
{
return name;
}
void Car::print()
{
cout << name;
}

Answer 1

These points need to be corrected:
while (!infile) prevents you from entering the loop.
You don't need two loops.
You can modify your loop like this:
for (int i = 0; i < sizeof(cars) && getline(infile, STRING); ++i)
cars[i].setName(STRING);
Or like this:
for (int i = 0; i < sizeof(cars) && infile; ++i) {
getline(infile, STRING);
cars[i].setName(STRING);
}

Answer 2

Your loop does at the moment nothing if the file is correctly opened. It will only enter if the call to open was unsuccessful.
Change your loop to either
while (getline(infile,STRING))
{
//...
}
or
while (infile)
{
//...
}

Answer 3

As it's been said, "Change while(!infile) to while(getline(infile,STRING))" but do not forget to remove the getline(infile,STRING); afterwards.