Main.cc: In function ‘int main()’:
Main.cc:10:13: warning: unused variable ‘A’ [-Wunused-variable]
int A[i];
^
Main.cc:13:9: error: ‘pro’ was not declared in this scope
pro=pro*i;
^~~
Main.cc:14:9: error: ‘A’ was not declared in this scope
A[i]=pro;
^
Main.cc:18:14: error: ‘A’ was not declared in this scope
sum+=A[i];
^