attempted answer to exercise 16-4

[mdeh]

I am not sure if this is what was meant, but here goes.
Note: Assumes "Cat in hat" passed as argument on command line.

Code: (Objective-C)

#import <Foundation/NSObject.h>
#import <Foundation/NSString.h>
#import <Foundation/NSProcessInfo.h>
#import <Foundation/NSDictionary.h>

int main (int argc, const char * argv[]) {
    NSAutoreleasePool	*pool = [[NSAutoreleasePool alloc] init];
	NSProcessInfo		*proc = [NSProcessInfo processInfo];
	int x;
	NSDictionary    *env = [proc environment];
	
	
	NSLog(@"Usage: \"activeProcessorCount.\" Number of Active Processors: %u", [proc activeProcessorCount]);
	NSLog(@"Usage: \"arguments\". Assumed \"Cat in hat\" in command line");
	NSLog(@"Usage: \"[arguments count]\" %u", [[proc arguments]count]);
	NSArray *args  = [proc arguments];
	NSLog(@"Iterate through NSArray \"arguments\"");
	for ( x = 1; x < args.count; x ++)
		NSLog(@"%@",  [args objectAtIndex: x]  );
	NSLog(@"Iterate through environment");
	for (id key in env)
	{
		NSLog(@"key: %@, value: %@", key, [env objectForKey:key]);
	}
	NSLog(@"Usage:\"globally Unique String\": %@", [proc globallyUniqueString]);
	NSLog(@"Usage:\"host name\": %@", [proc hostName]);
	NSLog(@"Usage:\"operating system\": %u", [proc operatingSystem]);
	NSLog(@"Usage:\"operating system name\": %@", [proc operatingSystemName]);
	NSLog(@"Usage:\"operating system version string\": %@", [proc operatingSystemVersionString]);
	NSLog(@"Usage:\"physical memory\": %llu", [proc physicalMemory]);
	NSLog(@"Usage:\"processIdentifier\": %u", [proc processIdentifier]);
	NSLog(@"Usage:\"process name\": %@", [proc processName]);
	NSLog(@"Usage: \"ProcessorCount.\" Number of Processors: %u", [proc processorCount]);

    [pool drain];
    return 0;
}