\input cap A short program in C. It was inserted directly into the \TeX\ source file. \medskip \BeginC #include void main() { a=~a; printf("Hello, world!\n"); // printf("Hello, world!\n"); } \EndC \hrule \bigskip And now a program inserted from a separate file. \medskip \InputC{prog/sun.c} \vfill\eject And now programs written in Pascal. This one was typed directly into this file. \medskip \BeginPascal program Hello_world; begin writeln('Hello, world!'); { writeln('Hello, world!'); } end. \EndPascal \hrule \bigskip This one was imported from another file. \medskip \InputPascal{prog/guess.pas} \bye