foo.cc: In function 'int main()':
foo.cc:9:33: warning: unused variable 'b' [-Wunused-variable]
    9 |         int a[200] = { 0 }; int b[200] = { 0 }; int c[200] = { 0 };
      |                                 ^
foo.cc:9:53: warning: unused variable 'c' [-Wunused-variable]
    9 |         int a[200] = { 0 }; int b[200] = { 0 }; int c[200] = { 0 };
      |                                                     ^

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