foo.c: In function 'add':
foo.c:5:21: error: expected ';' before '}' token
    5 |         return x1+x2
      |                     ^
      |                     ;
    6 | }
      | ~                    
foo.c: In function 'haha':
foo.c:9:17: error: expected ';' before '}' token
    9 |     return x1*x2
      |                 ^
      |                 ;
   10 | }
      | ~                
foo.c: In function 'xixi':
foo.c:13:21: error: expected ';' before '}' token
   13 |         return x1/x2
      |                     ^
      |                     ;
   14 | }
      | ~                    

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