Thread: fprintf in void function Not Printing

I have a function call in my main function. It is suppose to be a progress reporter. Each time the function is called, as shown below, the progress is to be printed on the screen.

Code:

loop_counter(&loop_count, some_constant);

The function body looks like the following:

Code:

void loop_counter(long long *loop_count, long long some_constant)
{
*loop_count++;
if(*loop_count % 40000 == 0 || *loop_count == some_constant)
fprintf(stderr,"\r %d %% done ", (long long)(100.0*(double)(*loop_count)/(double)some_constant));
}

For some reason, nothing gets printed on the screen. Can anyone tell me why this is?

If I replace

Code:

loop_counter(&loop_count, some_constant);

in my main() function with

Code:

loop_count++;
if(loop_count % 40000 == 0 || loop_count == totalN)
fprintf(stderr,"\r %d %% done ", (long long)(100.0*(double)loop_count/(double)totalN));

then everything works fine. I don't think the problem is the %d or the long long. The problem is that nothing at all gets printed to the screen.

Thanks. That did it