C++ syntax confusion - declaring unsigned char arrays - c++

Question

I have a function that takes two Image inputs (image and image2), mixing the color values pixel-by-pixel. Factor represents the percentage of the color value from image, so it follows that the remaining value (1-factor) is from image2. I have the pixel buffer represented by unsigned characters, and I'm having difficulty figuring out what syntax I need in order to access and set my values. I've tried a number of things, but right now it gives me the following error:
filters.C:91:41: error: scalar object ‘p’ requires one element in initializer
unsigned char *p = {red, green, blue};
The function:
void Filter::Execute()
{
if (input->GetWidth() == input2->GetWidth() && input->GetHeight() == input2->GetHeight())
{
int width = input->GetWidth();
int height = input->GetHeight();
output.ResetSize(width, height);
for (int w = 0; w < width; w++)
{
for (int h = 0; h < height; h++)
{
unsigned char red = input->GetPixel(w, h)[0]*factor+input2->GetPixel(w, h)[0]*(1-factor);
unsigned char green = input->GetPixel(w, h)[1]*factor+input2->GetPixel(w, h)[1]*(1-factor);
unsigned char blue = input->GetPixel(w, h)[2]*factor+input2->GetPixel(w, h)[2]*(1-factor);
unsigned char *p = {red, green, blue};
output.SetPixel(w, h, p);
}
}
}
}
And this is how I have my image class set up:
#include <image.h>
#include <stdlib.h>
Image::Image()
{
width = 0;
height = 0;
buffer = NULL;
}
Image::~Image()
{
if (buffer != NULL)
{
delete[] buffer;
}
}
void Image::ResetSize(int w, int h)
{
width = w;
height = h;
if (buffer != NULL)
{
delete[] buffer;
}
else
{
buffer = new unsigned char[3*width*height];
}
}
unsigned char * Image::GetPixel(int w, int h)
{
int index = h*width + w;
return buffer+3*index;
}
void Image::SetPixel(int w, int h, unsigned char *p)
{
int index = h*width + w;
buffer[3*index+0] = p[0];
buffer[3*index+1] = p[1];
buffer[3*index+2] = p[2];
}
What am I overlooking?

Answer 1

unsigned char * is not an array, it's a pointer. You want to declare it
unsigned char p[] = {red, green, blue};