ideally will be if you save all these codes in the same folder where you work.

untar 

>tar -xvf SOFTWARE.tar

type: make 

> ls

Makefile*           do_fits.h*          laplacian*          list_z_profile.c*
blank_frames*       do_fits.o           laplacian.c*        rectangular_mask*
blank_frames.c*     gauss_smear*        list_profile.c*     rectangular_mask.c*
do_fits.c*          gauss_smear.c*      list_z_profile*


> make

you will get a report:

~/Imaging/WWW/WORK_ASSIGN3/SOFTWARE/ make
cc -O3 -std=c99 -I/usr/include/cfitsio   -c -o blank_frames.o blank_frames.c
cc -o blank_frames blank_frames.o do_fits.o 
cc -O3 -std=c99 -I/usr/include/cfitsio   -c -o gauss_smear.o gauss_smear.c
cc -o gauss_smear gauss_smear.o do_fits.o -lm
cc -O3 -std=c99 -I/usr/include/cfitsio   -c -o laplacian.o laplacian.c
cc -o laplacian laplacian.o do_fits.o -lm
cc -O3 -std=c99 -I/usr/include/cfitsio   -c -o list_z_profile.o list_z_profile.c
cc -o list_z_profile list_z_profile.o do_fits.o -lm
cc -O3 -std=c99 -I/usr/include/cfitsio   -c -o rectangular_mask.o rectangular_mask.c
cc -o rectangular_mask rectangular_mask.o do_fits.o


> ls 


Makefile*           do_fits.h*          laplacian*          list_z_profile.c*
blank_frames*       do_fits.o           laplacian.c*        list_z_profile.o
blank_frames.c*     gauss_smear*        laplacian.o         rectangular_mask*
blank_frames.o      gauss_smear.c*      list_profile.c*     rectangular_mask.c*
do_fits.c*          gauss_smear.o       list_z_profile*     rectangular_mask.o



test your software:
blank_frames  256 256 0. BLANK.fits

ds9 BLANK.fits

gauss_smear DOPP_X_T_200.fits 0.002 DOPP_X_T_200_smeared.fits

do you get a blank fits file of the input size, and a blurred image of your original DOPP_X_T_200.fits image?