Question

How do you make all elements = 0 in the array sent as a parameter?

int myArrayFunction(int p_myArray[]) {
p_myArray[] = {0};//compiler error syntax error: ']'
.
.
}

Answer 1

No you can’t. There’s not enough information. You need to pass the length of the array too.

int myArrayFunction(int p_myArray[], int arrayLength) {
// --------------------------------------^ !!!

Then you can use memset or std::fill to fill the array with zero. (= {0} only works in initialization.)

    std::fill(p_myArray, p_myArray+arrayLength, 0);

---

Alternatively, switch to use a std::vector, then you don’t need to keep track of the length.

int myArrayFunction(std::vector<int>& p_myArray) {
    std::fill(p_myArray.begin(), p_myArray.end(), 0);