foo.cc: In function 'int main()':
foo.cc:8:2: error: expected initializer before 'for'
    8 |  for(int i=0;i<10;i++){
      |  ^~~
foo.cc:8:14: error: 'i' was not declared in this scope
    8 |  for(int i=0;i<10;i++){
      |              ^
foo.cc:11:7: error: 'a' was not declared in this scope
   11 |  sort(a,a+10);
      |       ^
foo.cc:11:2: error: 'sort' was not declared in this scope; did you mean 'qsort'?
   11 |  sort(a,a+10);
      |  ^~~~
      |  qsort

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