[Solved] assignment makes pointer from integer without a cast [enabled by default] in c language

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with your “warning” you also get a string number, where “warning” appears.
please give the string where an error appears

I did not see at first time your warnings

just replace the -1 to NULL or replace -1 to (void *)-1

course standard should be written to NULL, but if you really want, you can write (void *)-1

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solved assignment makes pointer from integer without a cast [enabled by default] in c language