About a line of code in problem

#1

what is meant by EOF? It is written after scanning n i.e. the no. of mixtures

#2

EOF is end of file
when input is completed loop will also completed

C++ provides a special function, eof( ), that returns nonzero (meaning TRUE) when there are no more data to be read from an input file stream, and zero (meaning FALSE) otherwise.

#3

Pls can you explain me that statement where inside while condn we are scanning input n and thn checking whether it is != EOF.

#4

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image1366×768 102 KB

here
we are scanning n first
if n exist then it take input and store inside n
but if there is no data then scanf("%d",&n) return EOF
and while loop entry condition fails and it come out of loop