foo.c: In function 'main':
foo.c:7:12: error: expected ';' before 'b'
    7 | else {a=a+b
      |            ^
      |            ;
    8 |         b=a-b;
      |         ~   
foo.c:18:12: error: expected ';' before 'c'
   18 | else {b=b+c
      |            ^
      |            ;
   19 |         c=b-c;
      |         ~   

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