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[CODE]class StudentMarks { public: int Marks; StudentMarks(); StudentMarks(int iMarks); char grade(); }; #include"grade.h" #include<iostream> using namespace std; StudentMarks::StudentMarks(int) { int iMarks=0; } /*StudentMark::StudentMark(int iStudentNewmark) { iStudentmark=iStudentNewmark;*/ char StudentMarks::getgrade() { if(iMarks>=80 && iMarks<=100) { return 'A'; } else if(iMarks>=75 && iMarks<80) { return 'A-'; } else if(iMarks>=70 && iMarks<75) { return …

[CODE]class StudentMark { public: StudentMark(); StudentMark(double); double getGrade(); }; #include"grade.h" #include<iostream> using namespace std; StudentMark::StudentMark() { double mark=0.0; } /*StudentMark::StudentMark(double dNewmark) { dmark=dNewmark; }*/ StudentMark::StudentMark { if(mark>=80&&mark=<100) grade='A'; else if(mark>=75&&mark<80) grade='A-'; else if(mark>=70&&mark<75) grade='B+'; else if(mark>=65&&mark<70) grade='B'; else if(mark>=60&&mark<65) grade='B-'; else if(mark>=55&&mark<60) grade='C+'; else if(mark>=45&&mark<55) grade='C-'; else if(mark>=40&&mark<45) grade='D'; else …

Can anyone expand on why you get this error?