Sounywey wrote: Quickly！Quickly！Quickly！
Well, it says that the amplitude is zero, so start there. Find out why it is zero.
We cannot tell what the code does from an image, because we cannot see the configuration panels of the express VIs. If you want more detailed advice, attach the actual VI. Did you write the program?
Could be me, but your VI is not working properly on the english version of LV. Can I suggest you to try programming in English in the future?
Yes, it's you. The VI is working just fine, except for some cosmetic issues with the labeling. I don't think is is a valid suggestion to force somebody to program in a specific language, especially since LabVIEW supports all these languages.
Here are the problems with the VI: