Exercise 12.2-12.7

[tknp]

main.m

Code: (Objective-C)

#import <Foundation/Foundation.h>

#define MINOF2(a,b)			( ((a) < (b)) ? (a) : (b) )
#define MAXOF3(a,b,c)		( ((a) > (b)) ? ((a) > (c)) ? (a): (c): ((b) > (c)) ? (b) : (c) )
#define IS_UPPER_CASE(x)	( ((x) >= 'A') && ((x) <= 'Z') )
#define IS_LOWER_CASE(x)	( ((x) >= 'a') && ((x) <= 'z') )
#define IS_ALPHABETIC(x)	( ( IS_UPPER_CASE(x) ) || ( IS_LOWER_CASE(x) ) )
#define IS_DIGIT(x)			( ((x) >= 0) && ((x) <= 9) )
#define IS_SPECIAL(x)		( ( !IS_ALPHABETIC(x) ) && ( !IS_DIGIT(x) ) )
#define ABSOLUTE_VALUE(x)	( ((x) >= 0) ? (x) : -(x) )


int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

    // exercise 12.2
	int lowNumber = MINOF2 (100-60,20);
	NSLog(@"Min value is %i", lowNumber);
	
	// exercise 12.3
	int highNumber = MAXOF3 (150+500,225,475);
	NSLog(@"Max value is %i", highNumber);
	
	// exercise 12.4
	(( IS_UPPER_CASE ('C') ) ? NSLog(@"Upper case letter") : NSLog(@"Not upper case letter"));
		
	// exercise 12.5
	(( IS_ALPHABETIC ('R') ) ? NSLog(@"Alphabetic") : NSLog(@"Not alphabetic"));
	
	// exercise 12.6
	(( IS_DIGIT (9) ) ? NSLog(@"Digit") : NSLog(@"Not digit"));
	(( IS_SPECIAL ('$') ) ? NSLog(@"Special character") : NSLog(@"Not special character"));
	
	// exercise 12.7
	int absoluteVal = ABSOLUTE_VALUE (-10-5-20);
	NSLog(@"%i", absoluteVal);
		
    [pool drain];
    return 0;
}