/* Demo: Lookup table. Compile: gcc -o table table.c */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>


// Table. Column1 and column2 are of type char
struct
{ char *in; char *out; } cmd[] = 
{
	{ "hello",	"hi there"	},
	{ "goodbye",	"see you later"	},
	{ "llama",	"duck!"		},
	{ "camel",	"bactrians4lfe"	},
	{ NULL,		NULL  		},
};


int main (int argc, char *argv[])
{
	int i;

	if (argc < 2)
		printf("usage: %s <command>\n");

	// Loop through each row of cmd[] comparing argv[1] to
	// cmd[].in and print the matching cmd[].out on successful
	// match. We stop looping when cmd[i].in = NULL
	for (i=0; cmd[i].in; i++)
		if (!strcmp(argv[1], cmd[i].in)) {
			printf("%s\n", cmd[i].out);
			exit(0);
		}
}