foo.cc: In function 'int main()':
foo.cc:32:16: warning: unused variable 'b' [-Wunused-variable]
   32 |  int n,a[1000],b=0,c=0,d=0,e=0;
      |                ^
foo.cc:32:20: warning: unused variable 'c' [-Wunused-variable]
   32 |  int n,a[1000],b=0,c=0,d=0,e=0;
      |                    ^
foo.cc:32:24: warning: unused variable 'd' [-Wunused-variable]
   32 |  int n,a[1000],b=0,c=0,d=0,e=0;
      |                        ^
foo.cc:32:28: warning: unused variable 'e' [-Wunused-variable]
   32 |  int n,a[1000],b=0,c=0,d=0,e=0;
      |                            ^

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