foo.cc: In function 'int main()':
foo.cc:7:12: error: expected ';' before 'while'
    7 |         c=0
      |            ^
      |            ;
    8 |         while(b<=a)
      |         ~~~~~
foo.cc:5:15: warning: unused variable 'b' [-Wunused-variable]
    5 |         int a,b,c;
      |               ^

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