I cant get this code to work, what am i doing wrong.

I want to enter a model number and print an output depending on the answer.

Please help and advise. Thanks.

Code :-
#include<stdio.h>
#include<conio.h>

int main (void)

{
clrscr();

char a[6];

printf("Please enter the Model Number? ");
scanf("%s", &a);

if (a == 123abc ) printf("Shelf 5");
if (a == 456def ) printf("Shelf 4");
if (a == 12ab54 ) printf("Shelf 3");
if (a == 76fred ) printf("Shelf 2");
if (a == 21jufs ) printf("Shelf 1");

Return 0;

}