somthing with ncurses I think

header.h

#ifndef HEADER_H
#define HEADER_H

#include <ncurses.h>
#include <wctype.h>

#define forever while(1)

#endif /*HEADER_H*/

main.c

#include <header.h>

int mainloop(int,char **);

int main(int argc,char **argv)
{
	initscr();
	keypad(stdscr,TRUE);
	cbreak();
	noecho();

	clear();
	int r=mainloop(argc,argv);

	endwin();
	return r;
}

mainloop.c

#include <header.h>

int mainloop(int argc,char **argv)
{
	halfdelay(1);
	WINDOW *win=newwin(20,100,10,20);
	box(win,0,0);
	wmove(win,1,1);

	forever
	{
		int ch=getch();
		if(iswalpha(ch))
		{
			wprintw(win,"%c",ch);
		}
		else
		{
			switch(ch)
			{
				case 0x7f:wprintw(win,"\b \b");break;
			}
		}
		wrefresh(win);
	}
}

Makefile

SRCPATH:=.

SRCS=$(shell find $(SRCPATH) -regextype posix-extended -regex '^.+\.(c)$$')
OBJS=$(addprefix build,$(addsuffix .o,$(basename $(SRCS:$(SRCPATH)%=%))))

CC:=gcc
LD:=gcc

LDFLAGS:=-lncurses
CFLAGS:=$(addprefix -I,$(SRCPATH))

default: main

all: clean main

main: $(OBJS)
	$(LD) $(LDFLAGS) -o $@ $^

build/%.o: $(SRCPATH)/%.c
	@mkdir -p $(dir $@)
	$(CC) $(CFLAGS) -c -o $@ $^

clean:
	rm -f $(OBJS)
	rm -f main

.PHONY: clean