foo.cc: In function 'int main()':
foo.cc:7:8: error: expected ';' before 'c'
    7 |  b=a%10
      |        ^
      |        ;
    8 |  c=a/10%10
      |  ~      
foo.cc:13:2: error: 'else' without a previous 'if'
   13 |  else
      |  ^~~~
foo.cc:5:10: warning: unused variable 'c' [-Wunused-variable]
    5 |  int a,b,c,d,s;
      |          ^
foo.cc:5:12: warning: unused variable 'd' [-Wunused-variable]
    5 |  int a,b,c,d,s;
      |            ^
foo.cc:5:14: warning: unused variable 's' [-Wunused-variable]
    5 |  int a,b,c,d,s;
      |              ^

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