foo.cc: In function 'int main()':
foo.cc:8:9: warning: unused variable 'n' [-Wunused-variable]
    8 |     int n=0,l,m=0,x,h=0;
      |         ^
foo.cc:8:15: warning: unused variable 'm' [-Wunused-variable]
    8 |     int n=0,l,m=0,x,h=0;
      |               ^
foo.cc:8:19: warning: unused variable 'x' [-Wunused-variable]
    8 |     int n=0,l,m=0,x,h=0;
      |                   ^
foo.cc:8:21: warning: unused variable 'h' [-Wunused-variable]
    8 |     int n=0,l,m=0,x,h=0;
      |                     ^

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