issue with vector-addion.cu  #13

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1. Coder2503 commented on Aug 29, 2025

   

   Coder2503

   on Aug 29, 2025

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   Hey Nick,
   I am getting an error in / Boundary Check
   if (tid < N) c[tid] = a[tid] + b[tid];
   but when i corrected according to vs suggestion to / Boundary Check
   if (tid < N) c[tid] == a[tid] + b[tid];
   then it says warning #174-D: expression has no effect
   1> if (tid < N) c[tid] == a[tid] + b[tid];
   However, after this warning, it showed "completed successfully" .
   I used the VS-2022 community. Can you please explain what happened, I am still confused

   Also, when I compile the same program with nvcc on WSL2-ubuntu 20.2 it says
   vector-add.cu(26): warning #174-D: expression has no effect
   but the compilation was done and on running the output file give this -
   vector-add: vector-add.cu:33: void verify_result(std::vector&, std::vector&, std::vector&): Assertion `c[i] == a[i] + b[i]' failed.
   Aborted

   Can you please help me out with the same

   Regards
   Pronod

   c[tid]==a[tid]+b[tid] is asserting if tid'th element of c equals sum of tid'th element of a and b and that's why it fails.
   if (tid < N){c[tid] = a[tid] + b[tid]; } is the way to go.