foo.c: In function 'main':
foo.c:9:5: error: 'cout' undeclared (first use in this function)
    9 |     cout<<"xiao wang shi huai dan"<<;
      |     ^~~~
foo.c:9:5: note: each undeclared identifier is reported only once for each function it appears in
foo.c:9:37: error: expected expression before ';' token
    9 |     cout<<"xiao wang shi huai dan"<<;
      |                                     ^
foo.c:12:34: error: expected expression before ';' token
   12 |     cout<<"xiao gu shi hao ren"<<;
      |                                  ^

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