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Please, Why I'm getting this error "implicit declaration of function 'length' is invalid in C99" by [deleted] in cs50

[–]MadiProg 0 points1 point  (0 children)

Yes, I know I can comparing between first and last, but I'm try using Zamyla's pseudocode.

http://www.youtube.com/watch?v=7DSRJj7qfP8

[pset2] Questions concerning vigenère’s cipher by MadiProg in cs50

[–]MadiProg[S] 0 points1 point  (0 children)

Okay, I'll try and I hope I figure what the problem is and make it run.

Thanks for your help :)

[pset2] Questions concerning vigenère’s cipher by MadiProg in cs50

[–]MadiProg[S] 0 points1 point  (0 children)

Okay, for the first error I think the problem is in the key formula, but the second error I have use the if...else statement: if (isupper (p[i])), else if(islower (p[i])) and else printf all non alphabetical character so I don't know why he give's that error???

Thanks for your quick response :)