Hello ,
I needed some assistance in copying a file in C programme.

I am doing something like this but failing to get rid of the garbage at the end of newly copied file.

Code for copying

FILE *u_fp = fopen(...);
FILE *u_fp_new = fopen(...);
char *block_ptr =
(char*)malloc((sizeof(char)*BUF_LEN_CHUNK)+1);
memset(block_ptr, '\0', sizeof(block_ptr));
int how_much_read=0,items_read=0;
do {
items_read = fread(block_ptr, BUF_LEN_CHUNK, 1, u_fp);
fflush(u_fp);
how_much_read = strlen(block_ptr);
fwrite(block_ptr, how_much_read, 1, u_fp_new);
fflush(u_fp_new);
}while( items_read != 0 );


Any assistance would be much appreciated .

You are using a wrong loop type, i.e. you are checking condition after writing, though you should write only in case you've read something meaningful.

thankyou Sergei .

using while loop solved it.