C++, error when finding length of an array, only when using SEPARATE FUNCTION

Asked Apr 08 '17 at 12:20

Active Apr 08 '17 at 12:52

Viewed 24 times

when I'm finding the length of an array, it keeps returning 2 if it is used in a seperate function. If i find the length in the main function however, it finds the length properly. If anyone can help, thank you so much. I'm a c++ noob

void printLength(int inputArray[]) {
        cout << "This is my value when finding the length in ANOTHER function: " << sizeof(inputArray)/sizeof(int) << endl;
}

int main()
{
    int testArray[] = { 1, 2, 3, 4, 5, 6 };


    printLength(testArray);

    cout << "This is my value when finding the length in the main function: " << sizeof(testArray)/sizeof(int) << endl;
}

This is my output

This is my value when finding the length in ANOTHER function: 2
This is my value when finding the length in the main function: 6

asked Apr 08 '17 at 12:20

Nick Cruz

How would the inputArray in function know the number of elements you have in your actual array? Because you only pass base address of the array. – Sniper Apr 08 '17 at 12:21
arrays are pointers, you are passing then a point to a int as parameter – ΦXocę 웃 Пepeúpa ツ Apr 08 '17 at 12:30
Arrays are not pointers! But there are no array function arguments. – aschepler Apr 08 '17 at 13:44

C++, error when finding length of an array, only when using SEPARATE FUNCTION

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