Classes and Functions

[DatDankMeme]

So I was trying this easy question out and when I executed it I got about 9 errors.
Code:-

#include<iostream>
#include <string>

using namespace std;

class item{
char name[50][3];
int code[3];
int price[3];

public:
    void input(int);
    int largest();
    int sum();
    void display(int);
};

void item::input(int i){
cout<<endl<<"Enter the Item name:- ";
cin.getline(name,50,i);
cout<<endl<<"Enter item code:- ";
cin>>code[i];
cout<<endl<<"Enter item price:- ";
cin>>price[i];
}

int item::largest(){
largest = price[0];
for(int j=1;j<3;j++){
    if(largest<price[i])
        largest = price[i];
}
return largest;
}

int item::sum(){
    int sum=0;
for(int p=0;p<3;p++){
    sum+=price[p];
}
return sum;
}

void item::display(int u){
cout<<endl<<"Name:- ";
cout.write(name,50,u);
cout<<endl<<"Price:- "<<price[u];
cout<<endl<<"Item code:- "<<code[u];
}

int main(){
int a, biggest = item.largest, total = item.sum;
cout<<endl<<"Enter data:- ";
for(a=0;a<3;a++){
    item.input(a);
}
cout<<endl<<"Largest  price:- "<<biggest;
cout<<endl<<"Sum:- "<<total;
for(int t=0;t<3;t++)
  cout<<endl<<endl<<"Display:- "<<endl<<item.display(t);
return 0;
}

and the errors that I got were:-

D:\C++\class employee\main.cpp: In function 'int main()':
D:\C++\class employee\main.cpp:53:22: error: expected primary-expression before '.' token
 int a, biggest = item.largest, total = item.sum;
                      ^
D:\C++\class employee\main.cpp:56:9: error: expected unqualified-id before '.' token
     item.input(a);
         ^
D:\C++\class employee\main.cpp:59:23: error: 'total' was not declared in this scope
 cout<<endl<<"Sum:- "<<total;
                       ^
D:\C++\class employee\main.cpp:61:45: error: expected primary-expression before '.' token
   cout<<endl<<endl<<"Display:- "<<endl<<item.display(t);
                                             ^
Process terminated with status 1 (0 minute(s), 0 second(s))
9 error(s), 0 warning(s) (0 minute(s), 0 second(s))
 

Thanks!

[Marcus Aseth]

You are trying to pass a multidmensional array to cin.getline, basically you're passing it a pointer to array of pointers.

You are trying to use largest as if it where a variable inside itself while it is a function.

cout.write again try to use a multidimensiona array.

Your calls to item.largest or item.sum again lack the () that specify they are functions.

Also calls like item.input(a); are using the variable type without creating a variable of that type first.
A proper call would be

item I;
I.input(a);

Switch to Visual Studio, it underline in red all this mistakes while you write them, spot them all without the need to read your code, very begginner friendly ;)

[jlb]

Where did you create an instance of your class named "item"? Remember that a class is an User Defined Type so in order to use members of that class you must first create an instance of that class and then use that instance.

item my_item; // Create an instance of your class.

int biggest = my_item.largest(); // Note that you are calling a member function not accessing a member variable.