#import <Foundation/Foundation.h>

int main()
{
    const char *bytes = "ͼƬ_6.png";
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    NSString *str = [[NSString alloc] initWithCString: bytes
                                             encoding: NSASCIIStringEncoding];
    NSLog(@"str: %@", str);
    // const char *nbytes = [str cStringUsingEncoding: NSUTF16StringEncoding];

    int max = [str length];
    char *nbytes = malloc(max + 1);

    int i;
    for (i = 0; i < max; i++)
    {
        unichar ch = [str characterAtIndex: i];
        nbytes[i] = (char) ch;
        printf("%x ", ch);
    }
    printf("\n");
    nbytes[i] = '\0';
    NSStringEncoding enc = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);

    NSLog(@"nstr: %@", [NSString stringWithCString: nbytes
                                          encoding: enc]);

    free(nbytes);
    [str release];
    [pool release];

    return 0;
}