Files under this directory:
s_in_[1-5].txt: 5 small input (sparse) matrices with 4-10 non-zero entries
l_in_1.txt:     a large sparse matrix with 300 non-zero entries
sparse.h:       a sample header file
sparse.c:       a sample file that you can use to build your project
p2_1.c:         a sample p2_1.c

sparse.o:       the object file obtained by the following command 
        gcc -c sparse.c -o sparse.o
a.out:        	the executable obtained by the following command
        gcc p2_1.c sparse.o

t[1-5].txt:     output files for the following commands:
        a.out s_in_1.txt t1.out
        a.out s_in_1.txt s_in_2.txt t2.txt
        a.out s_in_1.txt s_in_2.txt s_in_3.txt t3.txt
        a.out s_in_1.txt s_in_2.txt s_in_3.txt s_in_4.txt t4.txt
        a.out s_in_1.txt s_in_2.txt s_in_3.txt s_in_4.txt s_in_5.txt t5.txt

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