OC--declaration and definition of simple class

#import <Foundation/Foundation.h>

class declaration: Definition of Class name The first letter must be capitalized, if it is made up of multiple words using the Hump method: Example MyBlog

@interface person:nsobject{

The definition of a class property: The attribute name is preceded by an underscore: example _age

@public

int _age;

float _height;

}

Definition of a class method

-(void) eat;

@end

Implementation of the class

@implementation person

Implementing a class method

-(void) eat{

NSLog (@ "age =%d, height =%.2f people eating", _age, _height);

}

@end

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

Person *p = [[Person alloc] init];

Assigning a value to a class's properties

P->_age = 20;

P->_height = 170;

Calling class methods

[P eat];

Output Age and Height

NSLog (@ "age =%d, height =%.2f", P->_age, P->_height);

return 0;

}

OC--declaration and definition of simple class