Edited Import_Export_Player_Database.c

// It is not the actual program...
// Just a pieace of code to understand what i want to do...

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

// Structure that stores player name and score...
typedef struct {
    char name[32];
    int score;
} Player;

// Structure that stores number of players and database of all players...
typedef struct {
    Player* players;
    int no_of_players;
} Database;

// Function that stores database in binary mode...
void save_data(Database* o) {
    FILE* file = fopen("database.dat","wb");
    fwrite(o->players, sizeof (Player), o->no_of_players, file);
    fclose(file);
}

// Function that reads database in binary mode...
void get_data(Database* o) {
    /* Note: should check if fopens is successful. It's segfault if not */
    FILE* file = fopen("database.dat","rb");
    Player player;
    /* In case we dont know beforehand how many players are saved,
     * read one record at a time */
    while (fread(&player, sizeof (Player), 1, file) > 0) {
        o->players = realloc(o->players, sizeof (Player) * (o->no_of_players + 1));
        memcpy(&o->players[o->no_of_players], &player, sizeof (Player));
        o->no_of_players++;
    }
    fclose(file);
}

void Task_1_Take_And_Save_Data() {
    Database data;
    data.no_of_players = 3;
    data.players = (Player*)malloc(data.no_of_players*sizeof(Player));

    strcpy(data.players[0].name,"Mukul");
    strcpy(data.players[1].name,"Anil");
    strcpy(data.players[2].name,"Govind");
    data.players[0].score = 100;
    data.players[1].score = 200;
    data.players[2].score = 300;

    save_data(&data);
    printf("Data Saved Successfully");
    free(data.players);
}

void Task_2_Read_And_Print_Data() {
    Database data;
    /* Initialize players database */
    data.players = NULL;
    data.no_of_players = 0;
    get_data(&data);
    for(int i=0; i<data.no_of_players; i++) {
        printf("%s\n%d\n",data.players[i].name,data.players[i].score);
    }
}

int main() {
    printf("1.Save Data\n2.Read Data\nEnter Choice ---> ");
    int ch;
    // Make Sure 1st Enter choice 1 to save data and then choice 2 on next run to read saved data...
    scanf("%d",&ch);
    switch(ch) {
        case 1:
            Task_1_Take_And_Save_Data();
            break;
        case 2:
            Task_2_Read_And_Print_Data();
            break;
        default: printf("Oops! Invalid Choice...");
    }
    return 0;
}