Skip every two numbers

[3796URfi]

Hi, I was wondering how to skip every two numbers read from a file?
For example I have a list of integer values (from a text file) say,
100 90 80 78 67 56 20 78 99 54 89 100 90 80
and I wanted to print
100 78 20 54 90 on the screen which means skipping two numbers

[LB]

for(int i = 0, num; infile >> num; ++i)
{
    if(i%3 == 0)
    {
        std::cout << num << " " << std::flush;
    }
}

http://ideone.com/WPEHNG

[E0M1hbRD]

Would this help?

for(int i(0); i != filesize; i+=3){ cout << i...}

[LB]

Unless the file size is a perfect multiple of 3, that code will become an infinite loop and print garbage and (hopefully) crash.

[E0M1hbRD]

right, thanks

[3796URfi]

Thankyou for helping. Just one more question. If I wanted to read the file again from the beginning do I just close it and open again or is there another/better way?

[LB]

Google search:
http://www.cplusplus.com/forum/beginner/30644/