作业

NSArray*array=@[@"TimCook",@"JonyIve",@"SteveJobs",@"RobertBrunne",@"Philip Schiller"];
NSArray* sortArr = [array sortedArrayUsingSelector:@selector(compare:)];
NSLog(@"%@",sortArr);
NSComparator sortBlock = ^(id obj1,id obj2)
{
return [obj1 compare:obj2];
};
NSArray* sortArr2 = [array sortedArrayUsingComparator:sortBlock];
NSLog(@"%@",sortArr2);

#import <Foundation/Foundation.h>

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

//1.以下是身份证号，输出身份证人的性别，年龄
NSString *idCard=@"210423198809040427";

NSString* str =[NSString stringWithFormat:@"%@",idCard];

NSRange range = NSMakeRange(16, 1);
NSRange range1 = NSMakeRange(6, 4);
NSString* str1 = [str substringWithRange:range];
NSString* str2 =[str substringWithRange:range1];
int a =[str1 intValue];
int b =[str2 intValue];
if(a%2==0)
{
NSLog(@"性别女 年龄%d",2016-b);
}
else
{
NSLog(@"性别男 年龄%d",2016-b);
}

//身份证倒数＃2位是偶数则为女生
//2.将字典的key从Z->A排序，按排序后的key的顺序，输出value，将value按字符串输出
NSDictionary *dict=@{@"R":@"e",
@"T":@"e",
@"D":@"b",
@"S":@"u",
@"K":@"a",
@"A":@"s",
@"O":@" ",
@"N":@"p",
@"B":@"b",
@"J":@"u",
@"F":@" ",
@"U":@"t",
@"H":@"l",
@"E":@"j",
@"Z":@"s",

};
NSArray* array = [dict allKeys];
NSComparator sortBlock =^(id obj1,id obj2)
{
return [obj2 compare:obj1];
};
NSArray* sortArr =[array sortedArrayUsingComparator:sortBlock];
for(id obj in sortArr)
{
NSLog(@"%@:%@",obj,[dict objectForKey:obj]);
}

NSMutableArray* m =[[NSMutableArray alloc]init];
for(id ob in sortArr)
{
[m addObject:[dict objectForKey:ob]];
}
NSLog(@"%@",m);

NSString* join = [m componentsJoinedByString:@""];
NSLog(@"%@",join);
}

return 0;
}