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thanx

if I open a file that does not exist with mode r will the file pointer return as false? Example:



FILE *filePtr = fopen(".//file_does_not_exist.dat", "r");

if(!filePtr) {
printf("File...

alright makes sense, thats the way I thought it was anyway.....

that dosen't seem to work..... I need to send the varialbe that I created using malloc

/*I have looked thorugh the file copying threads and not one appears to work for me. I have a file I have written using random access (several different structs of different sizes and types) and I...

ok nvm it worked with "r+" thanks alot guys

ok no writing with "r+" is happening

hmmmmm I'm pretty sure you can read with "a+" but let me try "r+"...

I tried that (using fwrite with mode "a+")... it didn't apear to work

I have a file that requires updating..how do I delete a small part of the data in the file and then replace it with another chunk (of the same size)?

alright sweet. everything works good so far. Now how do I send this structure between functions?

ok thats cool.....

Is it possible to declare a global variable from within a function?? Thanx

but I need to open it in random access mode

ok another problem..... I'm having trouble writing the headers struct to a file:



fwrite(headers, sizeof(headers), 1, filePtr);


I've opened the file with "w+" for a mode. but when I write...

sweet that works awesome. Your my idol :P

I use TCLite (its the one I have at school) and here is the code I'm using:



struct colHeads headers[20]; //*headers = malloc( colNum * sizeof *headers );

FILE * filePtr;

for (count2...

I changed it to .c and I still get the same error.

struct colHeads *headers = malloc( colNum * sizeof *headers );

This gives me an error:



Cannot initialize 'colHeads near*' with 'void near*'

ok I think that makes sense

so are those the easiest ways? cause they are still pretty confusing

well thats cool, but maybe you could explain it just a little more?

How do I set the length of an array using a value from the user?



struct colHeads headers[colNum];

That dosen't work^.... Any ideas? Thanx.