Output format for make histogram

[sheriff4000]

When I run make histogram followed by ./histogram and feed inputs, the only output i get is that of stderr. Is this expected? Am I meant to make changes to the makefile?

[BPulmannova]

It will never enter the if(type==None) condition and break the while loop in histogram_main.cpp until you end the input stream with ctrl+d. After that though, you should observe your expected output.