Troubles with .doo files

#include <stdio.h>

typedef char byte;

struct dooHeader{
       char FileID[4]; //Should be "W3do"
       int version;    //Should be 7 for RoC, 8 for TFT
       int subversion; //Unsure of what this is
       int amount;     //Amount of trees defined
};

struct dooTreeTFT{          //Format for Frozen Throne trees
       char TreeID[4];      //Rawcode for the tree
       int variation;       //Variation of the model used
       float X_Pos;         //X coordinate on the map
       float Y_Pos;         //Y coordinate on the map
       float Z_Pos;         //Z coordinate on the map
       float angle;         //Rotation of the tree (radians)
       float X_Scale;
       float Y_Scale;
       float Z_Scale;
       byte flags;          //0 = invisible and non-solid, 1 = visible and non-solid, 2 = normal
       byte life;           //Percentage of the tree's life
       int item_table;      //Item table pointer, -1 = no item table >=0 = item table
       int items_dropped;   //Number of item sets dropped on death
       int Tree_ID;         //Unique to each tree
};

struct dooTreeROC{          //Format for Rain of Chaos trees
       char TreeID[4];      //Rawcode for the tree
       int variation;       //Variation of the model used
       float X_Pos;         //X coordinate on the map
       float Y_Pos;         //Y coordinate on the map
       float Z_Pos;         //Z coordinate on the map
       float angle;         //Rotation of the tree (radians)
       float X_Scale;
       float Y_Scale;
       float Z_Scale;
       byte flags;          //0 = invisible and non-solid, 1 = visible and non-solid, 2 = normal
       byte life;           //Percentage of the tree's life
       int Tree_ID;         //Unique to each tree
};

float RadToDeg(float radians)
{
      return radians * 180/3.14159;
}

int main(int argc, char* argv[])
{
     FILE *fp;
     dooHeader header;

     fp = fopen(argv[1], "r");
     fread(&header, sizeof(dooHeader), 1, fp);
     
     //printf("FileID: %s Version: %d Subversion: %d Amount of Destructables: %d ", header.FileID, header.version, header.subversion, header.amount);
     //^ that line makes a loud "beep" sound
     
     if (header.version == 7)
     {
        dooTreeROC tree[header.amount];
        fread(&tree, 42, header.amount, fp);
        
        fclose(fp);
        fp = fopen("outputdoo.j", "w");
        for(int i = 0; i < header.amount; i++)
        {
                char temp[5];
                temp[0] = tree[i].TreeID[0];
                temp[1] = tree[i].TreeID[1];
                temp[2] = tree[i].TreeID[2];
                temp[3] = tree[i].TreeID[3];
                temp[4] = '\0';
                fprintf(fp, "call CreateDestructableZ('%s',%.2f,%.2f,%.2f,%.2f,1.,%d)\n", temp, tree[i].X_Pos, tree[i].Y_Pos,
                       tree[i].Z_Pos, RadToDeg(tree[i].angle), tree[i].variation);
        }
     }
     else
     {
        dooTreeTFT tree[header.amount];
        fread(&tree, sizeof(dooTreeTFT), header.amount, fp);
        
        fclose(fp);
        fp = fopen("outputdoo.j", "w");
        for(int i = 0; i < header.amount; i++)
        {
                char temp[5];
                temp[0] = tree[i].TreeID[0];
                temp[1] = tree[i].TreeID[1];
                temp[2] = tree[i].TreeID[2];
                temp[3] = tree[i].TreeID[3];
                temp[4] = '\0';
               fprintf(fp, "call CreateDestructableZ('%s',%.2f,%.2f,%.2f,%.2f,1.,%d)\n", temp, tree[i].X_Pos, tree[i].Y_Pos,
                       tree[i].Z_Pos, RadToDeg(tree[i].angle), tree[i].variation);
        }
     }
     
     fclose(fp);
     getchar();
     return 0;
}