c 或 objective-c 等效于 Java 的 Integer.toHexString()？

Question

Is there is an equivalent in C or Objective-C to do the following (taken from Java)

Integer.toHexString(some_int)

Answer 1

For 32 bit Integers:

char buffer[enough_space_for_the_largest_string..];
sprintf (buffer, "%08x", YourNumber);

Answer 2

NSString *hexString = [NSString stringWithFormat:@"%x", yourNumber];

Answer 3

You can use itoa() with a base of 16 http://www.cplusplus.com/reference/clibrary/cstdlib/itoa/

Answer 4

The printf format specifiers %x and %X allow you to print an integer's hex representation. The same can be used with [NSString stringWithFormat:...] to get an Objective-C string.