nsstring and const char* conversion

Question

i try to convert nsstring to const char*.

1- i add a nsstring and an integer together
2- then i convert this new nsstring to const char*
3- i have an object

Answer 1

Use cStringUsingEncoding from the NSString class:

NSString *myString = @"Hello";
const char *cString = [myString cStringUsingEncoding:NSASCIIStringEncoding];