Matrix

#include <stdio.h>
#include <stdlib.h>

typedef struct {
  float *M;
  int size;
  int cols;
  int rows;
} matrix2;

float getAngle(int);
matrix2 copyMatrix2(matrix2 *);
int find(char *, char *);

int main(void) {
  matrix2 *x;
  matrix2 *y;
  x = (matrix2 *)malloc(sizeof(matrix2));
  x->cols = 2;
  x->rows = 2;
  x->size = x->rows * x->cols;
  x->M = (float *)malloc(sizeof(float)*x->size);
  x->M[0] = 5;
  *y = copyMatrix2(x);
  printf("%f\n", y->M[0]);
  return 0;
}

float getAngle(int n) {
  return 360/n;
}

int find(char *, char *) {
  /* Doing this in C Takes 4 arguments and a mess most likely */
  return -1;
}

matrix2 copyMatrix2(matrix2 *m) {
  matrix2 *error = NULL;
  matrix2 *copy;
  float *mCopy;
  int i = 0;
  int length = m->rows*m->cols;
  if (m == NULL) {
    return *error;
  }
  copy = (matrix2 *)malloc(sizeof(matrix2));
  mCopy = (float *)malloc(sizeof(float)*length);
  copy->rows = m->rows;
  copy->cols = m->cols;
  for (i=0; i<length; i++) {
    mCopy[i] = (m->M)[i];
  }
  copy->M = mCopy;
  return *copy;
}