How to convert decimal into octal in objective c

问题

just like my question, How can i convert decimal into octal in objective c? can somebody help me? it's make me dizy

回答1:

You have to initialize a new NSString object using the right format specifier.

Like :

int i = 9;
NSString *octalString = [NSString stringWithFormat:@"%o", i]; // %O works too.

This will create an autoreleased NSString object containing octal string representation of i. In case you start from a NSString containing a decimal number representation, you should first retrieve the number using :

int i = [myDecimalNumberAsAString intValue];

Here is a link to the format specifiers reference.

Hope this helps.

回答2:

Since Objective C is a superset of C you can just use C functions such as sprintf, e.g.

char s[32];
int n = 42;
sprintf(s, "%o", n);

来源：https://stackoverflow.com/questions/6647787/how-to-convert-decimal-into-octal-in-objective-c