In C++, to make a custom object, you use classes, structs, and unions (although unions are a more advance topic). A class is a user-defined type, where the default access modifier is private. A struct is a class, but where the default access modifier is public. A union is a more advanced topic, you may … Read more
In Objective C this can be done as follows: -(NSString *)decode:(NSString *)input { NSArray<NSString *> *components = [input componentsSeparatedByString:@”-“]; NSMutableString *output = [[NSMutableString alloc] init]; for (NSString *component in components) { if (component.length == 0) { continue; } char charValue = (char) [component intValue]; [output appendFormat:@”%c”, charValue + (‘a’ – 1)]; } return [NSString stringWithString:output]; … Read more