Algorithm-string inversion

String anyway work sometimes encounter, in fact, with the previous integer reverse output is a truth, of course, there are a lot of methods of implementation, some people write seven kinds of, can achieve good, commonly used to achieve two kinds, make a look at it:

Reverse.h

@interface reverse:nsobject-(void) reverse;-(NSString *) Reverse1: (NSString *) str; @end

REVERSE.M's Code:

@implementation reverse-(void) reverse{    char  arr[]= "flyelephant";    Nsinteger  Count=strlen (arr);    for (Nsinteger i=0; i<count/2; i++) {        char  temp=arr[i];        ARR[I]=ARR[COUNT-I-1];        arr[count-i-1]=temp;    }    NSLog (@ "Current string:%s", arr);} -(NSString *) Reverse1: (NSString *) str{    nsstring *[email  protected] "";    for (Nsinteger i=str.length-1; i>=0; i--) {        char  temp=[str characteratindex:i];        Result=[result stringbyappendingstring:[nsstring stringwithformat:@ "%c", temp]];    }    return result;} @end

Call:

         Reverse  *reverse=[[reverse Alloc]init];        [Reverse reverse];        NSLog (@ "The result of the final output is:%@", [Reverse reverse1:@ "Http://www.cnblogs.com/xiaofeixiang"]);        NSLog (@ "iOS technology Group: 228407086");

Effect:

　

Algorithm-string inversion