Cannt Open Struct

Nukem · 2002-05-29T00:33:23

Im trying to make my own 3d character file. So I started to make an editor for it just so I can make it work with OpenGL. But everytime I goto load the struct it wont load it. Im pretty sure its saving right and all the code looks right. Can someone plz help me? thx nuke #include <iostream.h> #include <string.h> #include <stdlib.h> #include <stdio.h> #include <fstream.h> struct NGC { double X; double Y; double Z; int Point_ID; NGC* next; }; void SaveNGC(char* FileName, NGC* ngc); void OpenNGC(char* FileName); void AddPoint(NGC** Head, double X, double Y, double Z) { NGC* temp = *Head; static int num = 0; while(temp != NULL) { temp = temp->next; } if(*Head == NULL) { *Head = new NGC; (*Head)->X = X; (*Head)->Y = Y; (*Head)->Z = Z; (*Head)->Point_ID = num; (*Head)->next = NULL; }else{ NGC* temp = new NGC; temp->X = X; temp->Y = Y; temp->Z = Z; temp->Point_ID = num; temp->next = *Head; *Head = temp; } num++; } void Print(NGC* Head, int Number) { if(Head == NULL) { cout << "Head == NULL\n"; return; } NGC* temp = Head; while(temp != NULL) { if(temp->Point_ID == Number) { cout << temp->X << endl; cout << temp->Y << endl; cout << temp->Z << endl; return; } temp = temp->next; } cout << Number << " not found!!!\n"; } int FileLen(char* FileName) { FILE* file; int count = 0; file = fopen(FileName, "rb+"); if(file == NULL) { return -1; } while(1) { char c; c = fgetc(file); if(c == EOF) { break; }else{ count++; } } return count; } int main(int argc, char* argv[]) { bool go = true; NGC* ngc; ngc = NULL; char yn; char Path[255]; double X, Y, Z; char rw[6]; cout << "Read or Write a file? "; cin >> rw; if(strcmp(rw, "read") == 0) { cout << "Enter Path: "; cin >> Path; OpenNGC(Path); return 0; } while(go == true) { cout << "Enter X: "; cin >> X; cout << "Enter Y: "; cin >> Y; cout << "Enter Z: "; cin >> Z; AddPoint(&ngc, X, Y, Z); cout << "Enter another point? "; cin >> yn; if(yn == ''n'') { go = false; } } yn = ''y''; while(yn == ''y'') { cout << "Display 3D_POINT? "; cin >> yn; if(yn == ''y'') { int num; cout << "3D_POINT: "; cin >> num; Print(ngc, num); } } cout << "Enter Path: "; cin >> Path; SaveNGC(Path, ngc); delete ngc; return 0; } void SaveNGC(char* FileName, NGC* ngc) { ofstream fout(FileName, ios::binary); fout.write(&ngc, sizeof(ngc)); fout.close(); } void OpenNGC(char* FileName) { NGC* ngc2; ngc2 = NULL; int num; ifstream fin(FileName, ios::binary); fin.read(&ngc2, sizeof(ngc2)); fin.close(); cout << "Enter Point_ID: "; cin >> num; Print(ngc2, num); delete ngc2; }

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Started by Nukem May 26, 2002 05:10 PM

10 comments, last by Nukem 22 years, 9 months ago

Alimonster

185

May 28, 2002 08:20 AM

Does OpenNGC need to read in the entire list or only one record? Remember that you'll have to create new structs before reading in, something like this untested function(assumes you want to read the entire list):

  void OpenNGC(char* filename, NGC** headNode){  ifstream input(filename, ios::binary);  int loopCount;  input >> loopCount; //assumes you've written the count to the file first      for (int i = 0; i < loopCount; ++i)  {    NGC* newNGC = new NGC;    newNGC->read(input);    if (*headNode == NULL)    {      newNGC->next = NULL;      *headNode = newNGC;    }    else    {      newNGC->next = *headNode;      (*headNode)->next = newNGC;    }  }}

or (pseudocode)...

  void OpenNGC(char* filename, NGC** headNode){  ifstream input(filename, ios::binary);  double x,y,z;  for (all elements)  {     read in x,y,x     AddPoint(headNode, x,y,z);  }}

[edited by - Alimonster on May 28, 2002 9:21:50 AM]

Nukem

Author

118

May 29, 2002 12:33 AM

thx for the help!

--------------------------Nukemmsn: nukem996@hotmail.comaim: nukem996open source open mind

Cannt Open Struct

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