foo.cc: In function 'int main()':
foo.cc:10:6: warning: variable 'a' set but not used [-Wunused-but-set-variable]
  int a, pp,b=0,d=0,e=0,n,p[1000];
      ^
foo.cc:10:9: warning: unused variable 'pp' [-Wunused-variable]
  int a, pp,b=0,d=0,e=0,n,p[1000];
         ^~
foo.cc:10:16: warning: unused variable 'd' [-Wunused-variable]
  int a, pp,b=0,d=0,e=0,n,p[1000];
                ^
foo.cc:10:20: warning: unused variable 'e' [-Wunused-variable]
  int a, pp,b=0,d=0,e=0,n,p[1000];
                    ^

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