OC语法--NSNumber对象

NSNumber对象用法：

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1. void test(void)
2. {
3. NSNumber *myNumber, *floatNumber,*intNumber;
4. NSInteger myInt;
5. 
6. intNumber = [NSNumber numberWithInt:10];
7. myInt = [intNumber integerValue];
8. NSLog(@"%li",myInt);
9. 
10. myNumber = [NSNumber numberWithLong:0xabced];
11. NSLog(@"%lx",[myNumber longValue]);
12. 
13. floatNumber = [NSNumber numberWithFloat:9];
14. NSLog(@"%g",[floatNumber floatValue]);
15. 
16. if ([intNumber isEqualToNumber:floatNumber] == YES) {
17. NSLog(@"num are equal");
18. } else {
19. NSLog(@"num are not equal");
20. }
21. if ([intNumber compare:floatNumber] == NSOrderedAscending) {
22. NSLog(@"first number less than second");
23. }
24. }