iOS Assigning instances from difference classes to Array

#import <Foundation/Foundation.h>
#import "Asset.h"
#import "Employee.h"

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

    @autoreleasepool {
        NSMutableArray *listOfEmployee = [[NSMutableArray alloc] init];
        
        int employeeCount = 0;
        
        for (employeeCount = 0; employeeCount < 10; employeeCount ++)
        {
        //create asset and employee isntances
        Employee *employee = [[Employee alloc] init];
        Asset *asset = [[Asset alloc] init];
        
        //set employeeID and asset number to ia
        employee.employeeID = employeeCount;
        asset.assetNumber = employeeCount;
       
        employee.employeeAsset = asset;
        
        [listOfEmployee addObject:employee];
        }
    
        //print listOfEmployee
       NSLog(@" %@", listOfEmployee);
   
    }
    return 0;
}

#import <Foundation/Foundation.h>
#import "Asset.h"


@interface Employee : NSObject
@property int employeeID;
@property Asset *employeeAsset;

@end

#import "Employee.h"
#import "Asset.h"

@implementation Employee
@synthesize employeeID;
@synthesize employeeAsset;


-(NSString *) description
{
    return [NSString stringWithFormat:@"Employee ID:%i with %@", employeeID,employeeAsset];
}

@end

#import <Foundation/Foundation.h>

@interface Asset : NSObject

@property NSString *assetLabel;
@property int assetNumber;

@end

#import "Asset.h"

@implementation Asset
@synthesize assetLabel;
@synthesize assetNumber;

-(NSString *) description
{
    return [NSString stringWithFormat:@"Laptop Number:%i",assetNumber];
}

@end