foo.cc: In function 'int main()':
foo.cc:7:10: warning: statement has no effect [-Wunused-value]
    7 |         x<10000;
      |         ~^~~~~~
foo.cc:5:13: warning: unused variable 'a' [-Wunused-variable]
    5 |         int a,b,x;
      |             ^
foo.cc:5:15: warning: unused variable 'b' [-Wunused-variable]
    5 |         int a,b,x;
      |               ^

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