If you're working on Linux then there's asynchronous I/O functions that do well.. http://www.gnu.org/s/libc/manual/html_node/Asynchronous-I_002fO.html#Asynchronous-I_002fO
<http://www.gnu.org/s/libc/manual/html_node/Asynchronous-I_002fO.html#Asynchronous-I_002fO>Windows might have similar functionality. On Thu, Apr 21, 2011 at 6:41 AM, Gary Drocella <[email protected]> wrote: > You could just use a pseudo-random number generator to fill in the > array. > You may also want to consider the data type (each unsigned int would > be 4 bytes, where a unsigned char would be 1 byte). > Or, If it's truly necessary to read this much data from the console... > You could use unix pipes, (cat file.out | ./myprog) > pipes in unix shells will redirect from the standard i/o... > The format of the file.out should be > input0 > input1 > input2 > ... > inputn > where I guess in your case n = 10^6 > That should work, but I don't code in c++ (only c) > On Apr 19, 10:11 pm, shubham <[email protected]> wrote: > > Hello Geeks, > > Suppose we have a 2-d array arr[1000][1000] capable of storing 10^6 > > elements in it. Input is supplied one row at a time. Then what is the > > best possible way to read this much data in the least amount of time > > as scanf() or cin takes a lot of time? > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/algogeeks?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
