foo.cc: In function 'int main()':
foo.cc:4:29: warning: unused variable 'h' [-Wunused-variable]
    4 |         int n,a,b,c,d,e,f,g,h,i,j,k,sum=0;
      |                             ^
foo.cc:4:31: warning: unused variable 'i' [-Wunused-variable]
    4 |         int n,a,b,c,d,e,f,g,h,i,j,k,sum=0;
      |                               ^
foo.cc:4:33: warning: unused variable 'j' [-Wunused-variable]
    4 |         int n,a,b,c,d,e,f,g,h,i,j,k,sum=0;
      |                                 ^
foo.cc:4:35: warning: unused variable 'k' [-Wunused-variable]
    4 |         int n,a,b,c,d,e,f,g,h,i,j,k,sum=0;
      |                                   ^

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