foo.cc: In function 'int main()':
foo.cc:37:12: error: expected ';' before ')' token
   37 |    for (--n)
      |            ^
      |            ;
foo.cc:44:4: error: expected primary-expression before 'return'
   44 |    return 0;
      |    ^~~~~~
foo.cc:43:20: error: expected ')' before 'return'
   43 |    printf("%d", a);
      |                    ^
      |                    )
   44 |    return 0;
      |    ~~~~~~           
foo.cc:37:8: note: to match this '('
   37 |    for (--n)
      |        ^
foo.cc:35:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   35 |    scanf("%d", &n);
      |    ~~~~~^~~~~~~~~~
foo.cc:36:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   36 |    scanf("%d", &a);
      |    ~~~~~^~~~~~~~~~

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