berox
asked on
C++ Language question
I have been since recently in C++-programming after
several years of turbo pascal. Now I've encountered a
problem that I just can't seem to solve.
I used in tp the function blockread to read several bytes
at once in a memory block assigned by memalloc.
the class I use in c++ is that of ifstream to open the
file.
reserve x number of 16-bytes paragraphs with memalloc.
The thing I want to do is read n bytes in one time out of
the file opened by ifstream and place them in the buffer
assigned by memalloc.
someone knows how to solve this problem ?
several years of turbo pascal. Now I've encountered a
problem that I just can't seem to solve.
I used in tp the function blockread to read several bytes
at once in a memory block assigned by memalloc.
the class I use in c++ is that of ifstream to open the
file.
reserve x number of 16-bytes paragraphs with memalloc.
The thing I want to do is read n bytes in one time out of
the file opened by ifstream and place them in the buffer
assigned by memalloc.
someone knows how to solve this problem ?
AVaulin
Use FILE structure and fopen, fread and fclose functions instead ifstream class. This way is the easiest.
ASKER
still remains the question how can I put them in a buffer allocated by memalloc and (I forgot to put it in my former question)is there a function to read the memory locations reserved by memalloc (something like Mem[Seg:ofs] in TP), or is it just "pointer-work"
Example:
struct YourStuct
{
int int1;
floaf float1;
char str[20];
}
void YourFunction( void )
{
YourStuct* s;
FILE* fp;
s = new YourStuct [20];
fp = fopen( "yourfile", "rb" );
fread( s, sizeof(YourStuct), 20, fp );
fclose( fp );
// do wht you want with s
delete s;
}
struct YourStuct
{
int int1;
floaf float1;
char str[20];
}
void YourFunction( void )
{
YourStuct* s;
FILE* fp;
s = new YourStuct [20];
fp = fopen( "yourfile", "rb" );
fread( s, sizeof(YourStuct), 20, fp );
fclose( fp );
// do wht you want with s
delete s;
}
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