How to return a struct from a function in C++?

Question

I've tried on a few different forums and can't seem to get a straight answer, how can I make this function return the struct? If I try 'return newStudent;' I get the error 'No suitable user-defined conversion from studentType to studentType exists.'

// Input function studentType newStudent() {        struct studentType     {         string studentID;         string firstName;         string lastName;         string subjectName;         string courseGrade;          int arrayMarks[4];          double avgMarks;      } newStudent;      cout << "\nPlease enter student information:\n";      cout << "\nFirst Name: ";     cin >> newStudent.firstName;      cout << "\nLast Name: ";     cin >> newStudent.lastName;      cout << "\nStudent ID: ";     cin >> newStudent.studentID;      cout << "\nSubject Name: ";     cin >> newStudent.subjectName;      for (int i = 0; i < NO_OF_TEST; i++)     {   cout << "\nTest " << i+1 << " mark: ";         cin >> newStudent.arrayMarks[i];     }      newStudent.avgMarks = calculate_avg(newStudent.arrayMarks,NO_OF_TEST );     newStudent.courseGrade = calculate_grade (newStudent.avgMarks);  } 

Answer 1

Here is an edited version of your code which is based on ISO C++ and which works well with G++:

#include <string.h> #include <iostream> using namespace std;  #define NO_OF_TEST 1  struct studentType {     string studentID;     string firstName;     string lastName;     string subjectName;     string courseGrade;     int arrayMarks[4];     double avgMarks; };  studentType input() {     studentType newStudent;     cout << "\nPlease enter student information:\n";      cout << "\nFirst Name: ";     cin >> newStudent.firstName;      cout << "\nLast Name: ";     cin >> newStudent.lastName;      cout << "\nStudent ID: ";     cin >> newStudent.studentID;      cout << "\nSubject Name: ";     cin >> newStudent.subjectName;      for (int i = 0; i < NO_OF_TEST; i++) {         cout << "\nTest " << i+1 << " mark: ";         cin >> newStudent.arrayMarks[i];     }      return newStudent; }  int main() {     studentType s;     s = input();      cout <<"\n========"<< endl << "Collected the details of "         << s.firstName << endl;      return 0; } 

Answer 2

You have a scope problem. Define the struct before the function, not inside it.