External array with variable size?
March 01, 2003 01:37 PM
How can I make an array that's external, and can change size while the program runs (in C)?
It's for a video buffer for a program with changing screen resolutions.
It doesn't have to be completely external, just in one c file.
Thanks.
PS I guess this question is pretty beginner so I ask it here.
[edited by - Lode on March 1, 2003 2:39:29 PM]
March 01, 2003 03:38 PM
quote: Original post by Anonymous Poster
"External"?
That was the most useless reply I could imagine.
March 01, 2003 04:00 PM
quote: Original post by LodeOriginal post by Anonymous Poster
"External"?
That was the most useless reply I could imagine.
If it didn''t accur to you,
"External"? == Elaborate on that, because that doesn''t seem to be the correct term.
133
March 01, 2003 04:04 PM
no, it wasnt, he was asking because your post contained something that doesn''t fit in. I still dont know what you mean for sure, but I think I have a slight idea.
What you want is a global, and a function to resize it. Because of this, it needs to be a pointer. here is an example:
pretty much. could use some extra things, like making the new buf smaller than the old one, but...
// Eric
What you want is a global, and a function to resize it. Because of this, it needs to be a pointer. here is an example:
char *vbuf;int x, y; // old size of the vbuf.bool Resize( int NewX, int NewY ){ if( NewX < x || NewY < y ) return false; char NewVbuf; NewVbuf = new char[NewX * NewY]; for( int i = 0; i < x; i++ ) { for( int n = 0; n < y; n++ ) NewVbuf = vbuf[n*y+i]; } delete vbuf; vbuf = NewVbuf; x = NewX; y = NewY; return true;} pretty much. could use some extra things, like making the new buf smaller than the old one, but...
// Eric
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