Question

I’ve got Function1 where user inputs data in array1. I must make array2 in Function2 to be equal to array1 from Function1.

How do I “tell it” that it should use array1 from Function1?

I’ve tried

array2[50] = array1[50];

but of course that is not working.

Answer 1

You need to copy array1 elementwise into array2, e.g.

for (unsigned i=0; i<array1_size; ++i) {
    array2[i] = array1[i];
}

You can also use std::copy from the algorithm header.

std::copy(array1, array1 + array1_size, array2);

For both approaches you need to know the number of elements in array1 (array1_size in the examples). Also, array2 needs to be at least as big as array1.