3D array Question
Author
How would you go about loading and saving a 3D array into a custom external file (say, file.dat or something)? I tried hours of experimentation using fscanf() and other c++ func''s to load and save one, and all i figured out was how to make a mock-up external file using putc(''\n'',file) to test loading it. Still cant load it right and obviously cant save one.
say your array is declared like that :
int array[10][20][30];
To save your array, you can do :
FILE *file;
file = fopen("filename.bin","wb");
if (!file) return error_code; // return your own err codes format
fwrite(array,sizeof(int),10*20*30,file);
fclose(file);
to load it, easy to guess :
FILE *file;
file = fopen("filename.bin","rb");
if (!file) return error_code; // return your own err codes format
fread(array,sizeof(int),10*20*30,file);
fclose(file);
Hope it helps
Exood4 Studios
http://www.exood4.com
[edited by - brunow on June 23, 2002 8:46:13 PM]
int array[10][20][30];
To save your array, you can do :
FILE *file;
file = fopen("filename.bin","wb");
if (!file) return error_code; // return your own err codes format
fwrite(array,sizeof(int),10*20*30,file);
fclose(file);
to load it, easy to guess :
FILE *file;
file = fopen("filename.bin","rb");
if (!file) return error_code; // return your own err codes format
fread(array,sizeof(int),10*20*30,file);
fclose(file);
Hope it helps
Exood4 Studios
http://www.exood4.com
[edited by - brunow on June 23, 2002 8:46:13 PM]
im only a neewbie. ive heard and used
file = fopen("filename.bin","w"); and
file = fopen("filename.bin","r"); but what does
file = fopen("filename.bin","wb"); and
file = fopen("filename.bin","rb"); do, or is it the same thing.
file = fopen("filename.bin","w"); and
file = fopen("filename.bin","r"); but what does
file = fopen("filename.bin","wb"); and
file = fopen("filename.bin","rb"); do, or is it the same thing.
In Windows, they actually do the exact same thing.
...elsewhere, the b stands for "binary" and opens up the file as a binary file instead of a text file, allowing you to manipulate it byte by byte, instead of reading lines and strings.
...elsewhere, the b stands for "binary" and opens up the file as a binary file instead of a text file, allowing you to manipulate it byte by byte, instead of reading lines and strings.
Author
Thanks brunow, it works. I''ve been using fprintf() all this time. -Appreciate the help.
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