Thread: Help with a program to "mirror" using pointers and struct

Hi,

I have to write a program that basically takes in values and spits out it's mirror. What I mean is for example if the data is 123 the output would 123321, it prints itself and then itself backwards. This is part of a larger program....I will put in what I have....I know I'm close I'm getting a few compile errors....I just need a little help to get over this help.

Code:

struct Vector {
  int size;
  float *data;
};

void AllocVector (struct Vector *VP, int n)
{
  VP->size = n;
  VP->data = malloc(n * sizeof(float));
  if(VP->data == NULL)
    {
      fprintf(stderr, "Memory allocation failed\n");
      exit(1);
    }
}

struct Vector Mirror (struct Vector v)
{

  struct Vector *mirror;
  int i = 0;
  int j = 0;

  AllocVector(mirror,v.size + v.size);
for (i=0; i<v.size; i++)
  {
 v.mirror[i] = v.data[i];
  //v.data[i] = mirror[i];
  }
j = i;

for (i=v.size-1; i>=0; i--)
  {
  {
mirror[j] = v.data[i];
j++;}

return mirror;
}

The compile errors I get are the following the refer to the assignment of mirror[i] to v.data[i] as well as j and the return. any help is greatly appreciated

Code:

vectora.c:84: incompatible types in assignment
vectora.c:91: incompatible types in assignment
vectora.c:94: incompatible types in return