foo.cc: In function 'int main()':
foo.cc:10:11: warning: unused variable 'x' [-Wunused-variable]
   10 |   int j=i,x=1,k=0;
      |           ^
foo.cc:6:8: warning: unused variable 'n1' [-Wunused-variable]
    6 |  int n,n1,c1=1,d1=1,s=9;
      |        ^~
foo.cc:6:11: warning: unused variable 'c1' [-Wunused-variable]
    6 |  int n,n1,c1=1,d1=1,s=9;
      |           ^~
foo.cc:6:16: warning: unused variable 'd1' [-Wunused-variable]
    6 |  int n,n1,c1=1,d1=1,s=9;
      |                ^~

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