all: compile test clean: rm -f histogramMain compile: histogramMain test: histogramMain echo AAAAAAAAAA | ./histogramMain echo AAABBBCCC | ./histogramMain ./histogramMain < histogramMain.c # which object files are needed? histogramMain: histogramMain.o histogram.o # necessary to document the use of the include file histogram.o: histogram.h histogramMain.o: histogram.h