how to get total in c++

Question

//main

#include "header.h"

int main()
{
person obj;
obj.get();

obj.display();

grades o;
o.getG();
o.displayG();

score s;

s.getM();
s.tot();
s.displayM();
return 0;
}

//header.h

#include <iostream>

using namespace std;

const int subjects = 5;

class person
{
private :
int age;
string name;
public:

person(){
age=0;
name="n";

}
~person(){

}
void get();
void display();

};

class grades
{
private:
int grade;

public:
grades(){
grade =0;

}

void getG();
void displayG();

};

class score
{
private:
int marks;
int total;

public:

public:
score(){
marks =0;
total = 0;
}

void getM();
void tot();
void displayM();

};

//imp.cpp

#include "header.h"

void person::display()
{
cout<<"Name is "<<name<<endl;
cout<<"Age is "<<age<<endl;

}
void person:: get()
{
cout<<"Enter the name "<<endl;
cin>>name;
cout<<"Enter the age "<<endl;
cin>>age;

}

void grades::displayG()
{
cout<<"The Grade is "<<grade<<endl;

}
void grades:: getG()
{
cout<<"Enter the Grade "<<endl;
cin>>grade;

}

void score::displayM()
{
cout<<"The score is "<<total<<endl;

}
void score:: getM()
{
for (int i; i<= subjects;i++)
cout<<"Enter the score of the subject "<<i<<endl;
cin>>marks;

}

void score :: tot()
{
total = total +marks;

}

I'm struggling at getting the for statement at void score:: getM() to work

if anyone can help me it would be great;

Answer 1

In the score::getM() for statement, i is not fully initialized with a value. Also, there need to be curly brackets around the contents of the for statement.

for(int i = 0; i <= subjects; i++) {
cout << "Enter the score of the subject " << i << endl;
cin >> marks;
}