Thread: Change array length

On beginning I define two arrays

a[5];
b[5];

after this I need next array C

c[5];

but when I have c[5] = a[5] + b[5]

I have overflow of array C.

how can I change length of array C in loop, I don't change C if I don't have overflow

It would be c[4] = a[4] + b[4].

Remember that arrays in C begin with index 0, so array[5] gives you indeces 0-4 only.

I know that a[0] is first element of array

I have need for something like this:

Code:

a[5] = {9,9,9,9,9,9}
+
b[5] = {8,8,8,8,8,8}
=
c[5+1] = {1,8,8,8,8,8,7}

that mean c[i+1] = a[i] + b[i]
but 1 in [i+1] is conditioned by add, it not always present

Code:

a[5] = {4,4,4,4,4,4}
+
b[5] = {4,4,4,4,4,4};
=
c[5] = {8,8,8,8,8,8};

in this case I don't have need for +1 in c[i]

Originally Posted by miroslavgojic

On beginning I define two arrays

a[5];
b[5];

after this I need next array C

c[5];

but when I have c[5] = a[5] + b[5]

I have overflow of array C.

how can I change length of array C in loop, I don't change C if I don't have overflow

Are you sure you're not tripping over that old C problem where the number of elements does not equal the numbers of the elements?

Array elements always number from 0, not from 1, so a[5] has elements numbered 0 ,1 ,2, 3, 4

There is no element #5... but there is The 5th Element