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  lt  lt    nPlease enter student information  n        cout  lt  lt    nFirst Name         cin  gt  gt  newStudent firstName       cout  lt  lt    nLast Name         cin  gt  gt  newStudent lastName       cout  lt  lt    nStudent ID         cin  gt  gt  newStudent studentID       cout  lt  lt    nSubject Name         cin  gt  gt  newStudent subjectName       for  int i   0  i  lt  NO OF TEST  i            cout  lt  lt    nTest    lt  lt  i 1  lt  lt    mark             cin  gt  gt  newStudent arrayMarks i              newStudent avgMarks   calculate avg newStudent arrayMarks NO OF TEST        newStudent courseGrade   calculate grade  newStudent avgMarks

User · Accepted Answer

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

User · Answer

You can now  C  14  return a locally-defined  i e  defined inside the function  as follows   auto f         struct S             int a        double b        s      s a   42      s b   42 0      return s     auto x   f    a   x a  b   x b

User · Answer

As pointed out by others  define studentType outside the function  One more thing  even if you do that  do not create a local studentType instance inside the function  The instance is on the function stack and will not be available when you try to return it  One thing you can however do is create studentType dynamically and return the pointer to it outside the function

User · Answer

studentType newStudent      studentType doesn t exist here          struct studentType    it only exists within the function               string studentID          string firstName          string lastName          string subjectName          string courseGrade           int arrayMarks 4            double avgMarks         newStudent        Move it outside the function   struct studentType       string studentID      string firstName      string lastName      string subjectName      string courseGrade       int arrayMarks 4        double avgMarks       studentType newStudent         studentType newStudent             return newStudent

User · Answer

Here is an edited version of your code which is based on ISO C   and which works well with G      include  lt string h gt   include  lt iostream gt  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  lt  lt    nPlease enter student information  n        cout  lt  lt    nFirst Name         cin  gt  gt  newStudent firstName       cout  lt  lt    nLast Name         cin  gt  gt  newStudent lastName       cout  lt  lt    nStudent ID         cin  gt  gt  newStudent studentID       cout  lt  lt    nSubject Name         cin  gt  gt  newStudent subjectName       for  int i   0  i  lt  NO OF TEST  i              cout  lt  lt    nTest    lt  lt  i 1  lt  lt    mark             cin  gt  gt  newStudent arrayMarks i              return newStudent     int main         studentType s      s   input         cout  lt  lt   n          lt  lt  endl  lt  lt   Collected the details of            lt  lt  s firstName  lt  lt  endl       return 0

[c++] How to return a struct from a function in C++?

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