C :: How To Do Search In Struct

So i create a simple structure,that has a firstname, lastname, age, dateofbirth.I would like it if i type what I am searching for print out there is one or not.But i have some trouble with equals(in array).. i type in the same "keresettnev" as "tanulok[i].Firstname" but it thinks not the same. (it works with age..)

Code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

struct student {
char *Firstname[40];
char *Lastname[40];
int age;

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