batch file

One may want to chain the task of execution of the program and display the function. For this there are two solution; one is to add into the C program a line with

exec("gnuplot | plot  'f.gnu' w l")

If it does not work try replace exec by "system".

The second method is to create a batch file, i.e. a text file say "mybatch" which contains the lines

a.out
gnuplot  
plot  "f.gnu" w l

and to change the access rights of the file "mybatch" by

 chmod 777 mybatch

to allow the command

 mybatch

to work.