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Questions - pass-by-reference

NEWBIE: passing a pointer to a function

I'm trying to relearn C from dabbling with it about 5 year ago. Specifically, I'm trying to learn how to extract a number of operations from main and make them into a function, with the aim of moving ...
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Kevin Zembower

c

pointers

pass-by-reference

pass-by-value

function-declaration

Votes: 0

Answers: 3

Latest Answer

The problem is that the pointer fp is passed to the function getfile by value. getfile(fp); That is the function deals with a copy of the value of the passed pointer fp. So changing the copy in the f...
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Vlad from Moscow

Javascript is it bad practice to return an object that is passed by reference

Let's say I have this function in JavaScript: function foo(a) { a.item = "four" return a } b = { item: "three" } b = foo(b) console.log(b) Since JavaScript is a call-by-sharing langua...
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bcsta

javascript

pass-by-reference

Votes: 0

Answers: 2

Latest Answer

You're correct, in your example the return statement is unnecessary, strictly speaking. Also, just as a point of clarification, while JS passes objects by reference, primitive types are passed by valu...
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Nate Norris

clarification for pointers in c language

this is a snippet from my code. I'm wondering if the pointers I'm using and the way I'm using them is valid. The code works but I need more clarification on how they work. Here's the code: void swapVa...
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User617290653251457439

c

pointers

pass-by-reference

Votes: 0

Answers: 1

Latest Answer

Assuming you mean max = *x; with *x instead of *p, then it works basically the same as the assignment *y = max; First the pointer x is dereferenced to get the value x is pointing to. Then that value...
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Some programmer dude

How can I call the following void function with double parameters?

This is what I have currently, and I have no idea what to do to make it run: void avg_sum(double a[], int n, double *avg, double *sum) { int i; *sum = 0.0; for (i = 0; i < n; i++) ...
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halolol

c

pass-by-reference

function-definition

function-call

Votes: 0

Answers: 2

Latest Answer

You want this: int main () { double array[5] = {1, 2, 3, 4, 5}; // use double double avg = 3; double sum = 2; avg_sum(array, 5, &avg, &sum); // call with & } avg_s...
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Jabberwocky

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