Printing different strings for reading different object variables - c++

Question

I wish to output different string for reading variables. For example, below, I wish to print Enter english marks before reading english marks using eng.setmarks(). Please suggest a way to implement this.
Here is my code: (look at for loop below)
#include <iostream>
#include <cstring>
using std::cin;
using std::cout;
class student {
char name[20];
int age;
class marks {
int marks;
public:
void setmarks( int x) {
marks = x;
}
int getmarks() {
return marks;
}
};
public:
marks eng, math, phy, chem, cs; // nested objects are public
void setname( char* n) {
strncpy( name, n, 20);
}
char* getname() {
return name;
}
void setage( int a) {
age = a;
}
float total() {
size_t total = eng.getmarks() + math.getmarks() +
phy.getmarks() + chem.getmarks() + cs.getmarks();
return total/500.0;
}
};
int main() {a
student new_stud;
char temp[20];
cout << "Enter name: ";
cin >> temp;
cin.get( temp, sizeof(temp));
new_stud.setname(temp);
int age;
cout << "Enter age: ";
cin >> age;
new_stud.setage( age);
for( size_t i = 0; i < 5; ++i) {
// I wish to output: "Enter marks in" + subject_name, but harcoding it seems tedious
}
cout << "\nTotal Percentage: " << new_stud.total();
return 0;
}

Answer 1

So if I understand correctly, you would like to print out the name of the variable which you are about to read into. Now this can't be done on the way you want it. The best thing you can do is make an array of subject names, and an array of marks.
string[5] Subjects = {"Maths", "English", "Chemistry", "Physiscs", "Computer Sciences"};
marks[5] Marks;
for(int i=0;i<5;i++) {
cout << "Please enter marks in " << Subjects[i] << ":" << endl;
int a;
cin >> a;
Marks[i].setmarks(a);
}
You could also make the marks class have a field subject name, and give it a function inputfromuser(), like this:
class marks {
int marks;
string subjectName;
public:
void setmarks( int x) {
marks = x;
}
int getmarks() {
return marks;
}
void inputfromuser() {
cout << "Please enter marks in " << subjectName << ":" << endl;
cin >> marks;
}
};
Sorry for me using the std::string type, I am not very comfortable with the raw char[] way to handle texts.