How to write log for every 10000 rows

[dusty]

Hi all,

This is my first time here. I have a doubt in writing c++ program to load a file of about 10million rows to the database. so when i read it, i need to track it if its loading properly for every 10000 times by writing a log. if anybody can help me out with this that will be great. thanks in advance.

[apiplani]

take a temporary variable... after every read increament the variable.. if variable value = 10000 ( or whatever) print to the log file, re-initialize the variale to 0 :

double _temp_coutner = 0.0;

..
..
..

while (fread...)
{
_temp_counter++;
if ( _temp_counter == 10000)
{
fprintf(log_file,"Processed another 10000... now processing <%s>", data_structure_string);
_temp_counter=0;
}
.
.
.
.....

} //end of while

[dusty]

Thanks a lot for your help. It works.

take a temporary variable... after every read increament the variable.. if variable value = 10000 ( or whatever) print to the log file, re-initialize the variale to 0 :

double _temp_coutner = 0.0;

..
..
..

while (fread...)
{
_temp_counter++;
if ( _temp_counter == 10000)
{
fprintf(log_file,"Processed another 10000... now processing <%s>", data_structure_string);
_temp_counter=0;
}
.
.
.
.....

} //end of while

[dusty]

Sorry I have a question again. I understood the concept but do i have to add any header file b'cos when i compile the program it says log_file & data_structure_string are not declared. I dont get the concept of writing it to a log file. Thanks a lot in advance & for your reply.

[D_C]

log_file and data_structure_string are variables. log_file is the file you are writing to as a log. You should be able to use a string to create a file handle, which you should call log_file, or whatever as long as it changes accordingly. data_structure_string is the data (a string most likely) that you are writing to the log file.

For example, if you wanted to write the first 10000 primes to a file called "C:\Docume~1\User\Desktop\primes.log", then log_file would be a pointer to the file handle, for C:\Docume~1\User\Desktop\primes.log. data_structure_string would be the first 10000 primes concatenated into one string.