How can I resolve this problem? Is it a library problems?Is there any mistake in setting?

Appreciate before hand!


1 Answer 1


There's a mistake in the code: it is using the variable name before the variable is declared. Perhaps compare the class source code for hello1.c with your program to find the mistake.

  • Thanks a lot! It's works now.
    – Pat
    Jan 17, 2022 at 8:50

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