help with using partial_sum method with my own list

Hello,
So for a program im supposed to use the partial_sum method with my own list. But when i try to compile the program i get two errors that say the same thing: lvalue required as left operand of assignment. I dont know what i can change in my list to make it work. Can anybody help?

The error points to this in the standard libraries (with GCC)

Code:

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*__result = __value;

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and it means that the result of dereferencing your iterator (*__result) must be something that can be assigned to (used on the left side of the assignment operator).

However, your operator * is defined like this:

Code:

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const T operator *() const { return current->value; }

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It should return a reference (non-const - for completeness you'd need a separate const_iterator class that returns a const reference):

Code:

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T& operator *() const { return current->value; }

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thank you so much. that fixed everything =)