I keep getting an error with the code below and I don't know why.
int sum(struct node *head)
{
int total = 0;
struct node *temp = head;
while (temp != NULL)
{
total += temp->data;
temp = temp->next;
}
}
Error C4716 'sum': must return a value
Just like the the error message is saying, you need a return statment:
int sum(struct node *head)
{
int total = 0;
struct node *temp = head;
while (temp != NULL)
{
//cout << temp->data << '\n'; //debug
total += temp->data;
temp = temp->next;
}
return total; // <-- add this!
}
As you write int sum(struct node *head) that means your funtion should return a integer value. So what you can do is that you can add a return statement at the end of your funtion.
Something like that
int sum(struct node *head)
{
int total = 0;
struct node *temp = head;
while (temp != NULL)
{
total += temp->data;
temp = temp->next;
}
return total;
}
And the statement where you call this function just assign that function to any integer variable.
int t = sum(head);
Hopefully that helps
int t = sum(*head); may be a guess too far. Odds are good that head would not need to be dereferenced.
sumpromises to return anintbut does not. Areturn total;at the end of the function is probably in order. I suspect a function with a name likesumshould return the calculated sum, and you went through all the trouble of computing it.}}. That's a poor way to place a curly brace, it gets lost in the jumble of code and doesn't indicate where a function ends. I suggest you give up this style asap, because it will make collaborating with other developers harder.