Absolute beginner's Objective-C question

[bburd]

I'm fine with Java, C++ and other languages but I'm absolutely new to Objective-C. I've been poking around with several tutorials but I can't seem to get the following code right. Can anyone help? Thanks.

#include <stdio.h>
#include <Foundation/Foundation.h>

@interface Employee
{
id name = [NSString string];
int social;
}
@property id name;
@property int social;

+ (void)displayListOfEmployees;
- (void)displayEmployee;

@end

@interface FullTimeEmployee : Employee
{
float salary;
}

- (float)changeSalaryBOOL)up byfloat)percent;

@end

#import "main.h"


@implementation Employee

+ (void)displayListOfEmployees
{
printf("This is a list of all employees\n");
}

- (void)displayEmployee
{
printf("%s %d\n", name, social);
}

@synthesize name;
@synthesize social;

@end


@implementation FullTimeEmployee : Employee

- (float)changeSalaryBOOL)up byfloat)percent
{
float temp;
if (up) {
temp = salary * (1.0 + percent);
} else {
temp = salary * (1.0 - percent);
}
return temp;
}

@end

int main(int argc, char *argv[])
{
id employee;
employee = [FullTimeEmployee new];

[FullTimeEmployee displayListOfEmployees];
employee.name = @"Barry";
employee.social = 1234567890];
[employee displayEmployee];

[employee free];
return EXIT_SUCCESS;
}

[ZunePod]

Are you getting compile errors?

[bburd]

Originally Posted by ZunePod

Are you getting compile errors?

id name = [NSString string]; //expected ":", ",", ";", or "}" or '__atribute__' before "=" token

@property id name; //no 'assign', 'retain' or 'copy attribute is specified -- 'assign' is assumed

printf("%s %d\n", name, social); // 'name' undeclared

@synthesize name; // synthesized property 'name' must either be named as the same as a compatible ivar or must explicitly name an ivar

[ZunePod]

Put this between the {} in your .h

NSString *name;

Then have this in your .m:

id name = [NSString string]; 
name = @"TheNameYouWant";

printf("%s %d\n", name, social); // 'name' undeclared
NSLog("%@ %d\n", name, social);

Bolded is the correct code, the other two lines are not needed.

BTW: What is social, which data type?

[bburd]

#include <stdio.h>
#include <Foundation/Foundation.h>

@interface Employee
{
NSString *name;
int social;
}
@property id name; /Users/bburd/XCodeProjects/EmployeeConsole/main.h:9:0 /Users/bburd/XCodeProjects/EmployeeConsole/main.h:9: warning: no 'assign', 'retain', or 'copy' attribute is specified - 'assign' is assumed


@property int social;

+ (void)displayListOfEmployees;
- (void)displayEmployee;

@end

@interface FullTimeEmployee : Employee
{
float salary;
}

- (float)changeSalary:(BOOL)up by:(float)percent;

@end

#import "main.h"


@implementation Employee

+ (void)displayListOfEmployees
{
printf("This is a list of all employees\n");
}

- (void)displayEmployee
{
NSLog("%@ %d\n", name, social); /Users/bburd/XCodeProjects/EmployeeConsole/main.m:13:0 /Users/bburd/XCodeProjects/EmployeeConsole/main.m:13: warning: passing argument 1 of 'NSLog' from incompatible pointer type

}
name = @"TheNameYouWant"; /Users/bburd/XCodeProjects/EmployeeConsole/main.m:15:0 /Users/bburd/XCodeProjects/EmployeeConsole/main.m:15: warning: data definition has no type or storage class


@synthesize name;
@synthesize social;

@end


@implementation FullTimeEmployee : Employee

- (float)changeSalary:(BOOL)up by:(float)percent
{
float temp;
if (up) {
temp = salary * (1.0 + percent);
} else {
temp = salary * (1.0 - percent);
}
return temp;
}

@end

int main(int argc, char *argv[])
{
id employee;
employee = [FullTimeEmployee new]; /Users/bburd/XCodeProjects/EmployeeConsole/main.m:40:0 /Users/bburd/XCodeProjects/EmployeeConsole/main.m:40: warning: 'FullTimeEmployee' may not respond to '+new'


[FullTimeEmployee displayListOfEmployees];
employee.name = @"Barry"; /Users/bburd/XCodeProjects/EmployeeConsole/main.m:43:0 /Users/bburd/XCodeProjects/EmployeeConsole/main.m:43: error: request for member 'name' in something not a structure or union


employee.social = 1234567890;
/Users/bburd/XCodeProjects/EmployeeConsole/main.m:44:0 /Users/bburd/XCodeProjects/EmployeeConsole/main.m:44: error: request for member 'social' in something not a structure or union



[employee displayEmployee];

[employee free];
/Users/bburd/XCodeProjects/EmployeeConsole/main.m:47:0 /Users/bburd/XCodeProjects/EmployeeConsole/main.m:47: warning: no '-free' method found



return EXIT_SUCCESS;
}

[ZunePod]

I think you need to go right back to the basics.