integer int, reverse string

#import <Foundation/Foundation.h>

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

@autoreleasepool {

1. There are 123456789, how to put the number of each digit, starting at the end of a sequence into an array

(then the first element of this new array is 9, one time and so on) if you succeed, walk them out.

NSNumber *[email protected];

Nsarray *[email protected][@ "1", @ "2", @ "3", @ "4", @ "5", @ "6", @ "7", @ "8", @ "9"];

NSString *str=[nsstring stringwithformat:@ "%@", Num];

Nsmutablearray *mutarr=[nsmutablearray Array];

for (int i=8; i>=0; i--) {

Nsrange RANG0;

Rang0.location=i;

rang0.length=1;

NSString *str1=[[nsstring Alloc]init];

Str1=[str SUBSTRINGWITHRANGE:RANG0];

[Mutarr ADDOBJECT:STR1];

}

For (id xin in Mutarr) {

NSLog (@ "%@", Xin);

}

NSLog (@ "????????????????????????????????????????????????????????");

2. How to invert the string @ "abc123xyz789"

NSString *[email protected] "abc123.xyz789";

Nsmutablestring * mutstr1=[nsmutablestring string];

for (int i=0; i<strd.length; i++) {

Unichar C=[STRD Characteratindex:strd.length-i-1];

[Mutstr1 appendformat:@ "%c", c];

}

STR=MUTSTR1;

NSLog (@ "%@", str);

NSLog (@ "????????????????????????????????????????????????????????");

NSString *[email protected] "May 05, 2013";

Nsrange rang;

rang.location=0;

rang.length=4;

NSString *new=[time Substringwithrange:rang];

NSLog (@ "%@", new);

Nsrange rang1;

rang1.location=8;

rang1.length=2;

NSString *new1=[time Substringwithrange:rang1];

NSLog (@ "%@", New1);

Nsrange rang2;

rang2.location=8;

rang2.length=2;

NSString *new2=[time Substringwithrange:rang2];

NSLog (@ "%@", new2);

NSString *newstr=[new stringbyappendingformat:@ "-%@-%@", new1,new2];

NSLog (@ "%@", newstr);

}

return 0;

}

integer int, reverse string