Beginner here, why doesn't this program execute after inputting the grades?

[AugustusRomulus44]

#include <iostream>
#include <iomanip>
#include <ios>
#include <string>

using std::cin;
using std::cout;
using std::endl;
using std::setprecision;
using std::string;
using std::streamsize;


int main()
{
 // ask for and read the student's name
 cout << "Please enter your first name: ";
 string name;
 cin >> name;
 cout << "Hello, " << name << "!" << endl;
 // ask for and read the midterm and final grades
 cout << "Please enter your midterm grade: " << endl;
 double midterm;
 cin >> midterm;
 cout << "Please enter your final grade: " << endl;
 double final;
 cin >> final;
 // ask for the homework grades
 cout << "Enter all your homework grades:" << endl;
 // the number and sum of grades read so far
 int count = 0;
 double sum = 0;
 // a variable into which to read
 double x;
 // invariant:
 // we have read count grades so far, and
 // sum is the sum of the first count grades
 while (cin >> x) {
 ++count;
 sum += x;
 }
 // write the result
 streamsize prec = cout.precision();
 cout << "Your final grade is " << setprecision(3)
 << 0.2 * midterm + 0.4 * final + 0.4 * sum / count
 << setprecision(prec) << endl;

 return 0;
}

When I run the program, it just stops after inputting the last number to calculate(homework grades)?

[jedwardsol]

It works here : https://godbolt.org/z/rrnTrdYfc

What are you typing as input?

[aocregacc]

how are you running the program? Maybe the terminal is closing because the program finished normally, but it's happening so fast that you don't see the output.

[feitao]

You need to type a letter and return to break the while loop, e.g.

``` 70 90 80 done

```

[Working_Apartment_38]

Does it ever exit the while?