#include<iostream>#include<vector>#include<ios>#include<iomanip>#include<stdexcept>#include<algorithm>#include<string>using namespace std;struct student{ string name; double major; double minor; vector<double> hw;};istream& input(istream& in, struct student& s){ cout<<"Enter your name, major and minor marks respectively: "; in>>s.name>>s.major>>s.minor; //cout<<"hey"<<s.name<<s.major<<s.minor<<endl; if(in) { cout<<endl<<"Now enter your homework marks respectively: "; s.hw.clear(); double x; while(in>>x) s.hw.push_back(x); in.clear(); } return in;}double grade (struct student& s){ vector<double>::size_type t = s.hw.size(); if(t!=0){ sort(s.hw.begin(),s.hw.end()); double med = (t%2==0)?(s.hw[t/2]+s.hw[1+t/2])/2:s.hw[t/2]; return .4*s.major+ .2*s.minor + .4*med; }else{throw domain_error("The student does not enter any homework.");}}int main(){ vector<struct student> students; struct student sl; while(input(cin, sl)) { students.push_back(sl); } cout<<endl; for(int i=0;i<students.size();i++) { struct student s=students[i]; try{ double t=grade(s); streamsize l = cout.precision(); cout<<"Name = "<<s.name<<" final grade = "<<setprecision(3)<<t<<setprecision(l)<<endl; }catch(domain_error){ cout<<s.name<<" you must enter your homework's marks."<<endl<<"Please try again."; return 1;} } return 0;}I run the code after entering the data in the homework vector. When I enter the eof (Ctrl+D)it comes to the input function but does not take any input so it exits the while loop in main().
output
Enter your name, major and minor marks respectively: jack 39 49Now enter your homework marks respectively: 20 10 19 Enter your name, major and minor marks respectively: Name = jack final grade = 33What should I do such that It will take another student data? Is there any problem with the Ctrl+D?
Note: I am using Ubuntu in WSL.