menu3.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

char *menu[] ={
	"a - add new record",
	"d - delete record",
	"q - quit",
	NULL,

};

int getchoice(char *greet, char *choices[],FILE *in,FILE *out);

int main()
{
	int choice = 0;
	FILE *input;
	FILE *output;

	if(!isatty(fileno(stdout))) {
		fprintf(stderr,"You are not a terminal!,OK\n");
		//exit(1);
	}
	
	input = fopen("/dev/tty","r");
	output=fopen("/dev/tty","w");
	if(!input || !output) {
		fprintf(stderr,"Unable to open /dev/tty\n");
		exit(1);
	
	}

	do{
		choice=getchoice("Please select an action",menu,input,output);
		printf("You have chosen: %c\n",choice);

	}
	while(choice !='q');
	exit(0);
}


int getchoice(char *greet, char *choices[],FILE *in,FILE *out)
{
	int chosen =0;
	int selected;
	char **option;
	do
	{
		fprintf(out,"Choice: %s\n",greet);
		option=choices;
		while(*option){
			fprintf(out,"%s\n",*option);
			option++;
		}
		do{
			selected=fgetc(in);
		}while(selected == '\n');
		option=choices;
		while(*option){
			if(selected == *option[0]){
				chosen =1;
				break;
			}
			option++;
		}
		if(!chosen){
			fprintf(out,"Incorrect choice, select again\n");
		}
	} while(!chosen);
	return selected;


}