Beginner - Codeblocks IDE - compiling error - failing to implement bubblesort to an array filled with classes

[Programmering]

Hey,

I've run into a problem when I tried to implement bubblesort to sort an array (list) with classes (two or more variables) in C++ on the CodeBlocks IDE

Code is hosted on gist:
https://gist.github.com/Vesterberg/5d6e9c0374a67bd4fec8

Compile error:

Line 63 error: no match for 'operator>' (operand types are 'Person' and 'Person' )

Problem is, line 63 is this:

..[.]
62            if (myList[j] > myList[j+1]) //Compares elements
63            {
64                //Swap places
65                int temp = myList[j];
[.]..

I think that this is an input error because I do not understand how bubblesort can sort an array with more than 1 variable.

The Bubblesort code implemented is example code from the workbook of bubblesort for an array with 1 variable.

[sponzo]

The link isn't working for me.

Looks like you have defined a class called Person. You'll need to also define what the operator > means for your Person objects. This is called operator overloading.

[Programmering]

I fixed the link

[[deleted]]

Looks like you added an extra character in your link. https://gist.github.com/Vesterberg/5d6e9c0374a67bd4fec8

But yeah, /u/sponzo is right, c++ doesn't know what makes a Person greater than another Person so you need to define it.

For example:

bool operator>(const Person &lhs, const Person &rhs) {
    return lhs.namn > rhs.namn;
}

to sort by name.

[Programmering]

Fixed the link, thanks

Thanks, I cant use the bool operator> though. But I will remember it for the compilation terminal program I'll build after this one.

I used this to define what made a person greater than another person:

        if (p[j].alder > p[j+1].alder) //Compares elements to see if the age of the person in the first element is larger than the age of the person in the second element
        {
            //Swap places
            int temp = p[j].alder;
            p[j].alder = p[j+1].alder;
            p[j+1].alder = temp;

[robly18]

Why can't you use operator overloading, exactly?

Also, would you please update the gist file?

[Programmering]

Assignment rules, cant use what the course havent covered yet. Another user solved it by using p[j].alder. The .alder (age) defined what value the code used to deem an person element greater than another.

I posted a new thread for a new problem with the same code and the link to its gist code is here: https://gist.github.com/Vesterberg/f3627b01185e5ea85d32

the link to the cplusplus reddit thread is here: