i had to teach a C programming course that used ed as the editor because i could not at the time get vi/ex to work because of terminfo/termcaps and other proble

i had to teach a C programming course that used ed as the editor because i could not at the time get vi/ex to work because of terminfo/termcaps and other problems (which i later fixed). also bourne shell. students, who were on a basically business oriented IT course in about 1985 (?) never complained. try inflicting something like that on people now, though it might be good for them.