transform matrix 2D to 1D

Question

I have an issue passing a matrix 2D to a vector(1D array)with function in C. There is the code of what i want to create:

#include 
#define N          


        

Answer 1

This is how you do it in 17 times less lines:

#define N 8

int mat2d[N][N] = { /* stuff */ };
int vec1d[N * N];
memcpy(vec1d, mat2d, sizeof vec1d);