Why does the output values are changing in the below two codes? Even though they are same codes.😰

Question

I created a two codes using single code.😅

The only one difference between these two code is

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the printf() function are swapped
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(See those two code to understand clearly)

But why the output are also changed in this two code?

Please explain it ....😅

And also tell how does output comes like this?
https://code.sololearn.com/c1o0eq6YhhlX/?ref=app
https://code.sololearn.com/cnY7bCxb0hDK/?ref=app

Answer 1

Remove the 5 in char str1[5] = "hello";
I think it is related to the null character, '\0'
char array without it is not considered a c-string, therefore causing undefined behavior in strlen()
Details: https://www.thegeekstuff.com/2011/12/c-arrays/