目标C奇数小数到长期转换

NSLog(@"%llu\n\n", ULONG_LONG_MAX);

NSDecimalNumber *decimal = [NSDecimalNumber decimalNumberWithString:@"154550038129946620"];
NSLog(@"%@", decimal);
NSLog(@"%llu\n\n", [decimal unsignedLongLongValue]);

decimal = [NSDecimalNumber decimalNumberWithString:@"154550038129946628"];
NSLog(@"%@", decimal);
NSLog(@"%llu", [decimal unsignedLongLongValue]);
NSLog(@"%llu\n\n", ULONG_LONG_MAX);

NSDecimalN