ppm image flipping c++

[psully]

I have been having trouble with my code to flip an image vertically in c++. My code as of now just gives me the exact copy of the image I started with. Any ideas? Thank you

void ppmFlipVertical(int image[MAXROWS][MAXCOLS], int numRows, int numCols)
{
	int temp, N,L,c;
	N=3*numRows;
	L=3*numCols;
	c=0;
	
		for(int r=0; r<(N/2); r++)
		{
			temp=image[r][c];
			image[r][c] = image[N-1-r][c]; 
			image[N-1-r][c] = temp;
		}
}

[ats15]

I don't understand why you use the N and L values that you use. You just loop over c=0, so only one column is inverted. You need to have a nested loop, something like

       for(c=0;c<L;c++)
      {
		for(int r=0; r<(N/2); r++)
		{
			temp=image[r][c];
			image[r][c] = image[N-1-r][c]; 
			image[N-1-r][c] = temp;
		}
      }

[psully]

When i try the code above, I only get an output of about a third of the image from the right side.. I've tried this way, but I deleted to for(int c=0;c<L;c++) loop because it was giving me only part of the image as the output. Any ideas from here?

[cire]

Using two dimensional array syntactic sugar and feeding the function the number of rows and columns (which suggests the syntactic sugar will be incorrect) seems a wee bit off.