How to Get Histogram from MACD and Signal lines?

[Mohammad Sh]

I successfully used the code below to get the last n values of MACD and Signal lines:

CopyBuffer(handleMACD, 0, n, inputBufferNumber, bufferMACD);
CopyBuffer(handleMACD, 1, n, inputBufferNumber, bufferSignal);

However, I also need the Histogram line.
How can I get the the last n values of the Histogram line?

[William Roeder]

mohammad sh: However, I also need the Histogram line.

Just compute it. ^histogrami = ^macd i - ^signali .

[Mohammad Sh]

William Roeder #:
Just compute it. ^histogrami = ^macd i - ^signali .

double hist[3];
for (int i = 2; i >= 0; i--) {
   hist[i] = bufferMACD[i] - bufferSignal[i];
}

I used the code above. It seems to work. However, when I try,

double hist[n];

I get invalid index value error.