prep for union of 2 arrays

#include<stdio.h>
//prep to copy two arrays of integers into one. (form a union)
int main()
{
  int i=0;
  int a[] = {1,2,3,4,5,6,7,8};
  int b[] = {14,15,16};

  int M = sizof(a) / sizeof(int);
  int N = sizof(b) / sizeof(int);

  int* c = malloc( (M+N)* sizeof(int) );

  return 0;
}