Error 'a' is not declared in this scope

#1

int n = sizeof(a) /sizeof(int);
whenever I use this statement I received an error ‘a’ is not declared in this scope even I use ( using namespace std;)

How can i solve this…???

#2

hi @shristimalviya77_93a05e326061f1a7, u may not have defined a in that scope
please share the code i’ll help you
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