/in/foo.c: In function 'main':
/in/foo.c:9:20: warning: implicit declaration of function 'pow' [-Wimplicit-function-declaration]
              si=si+pow(10,i-1);
                    ^~~
/in/foo.c:9:20: warning: incompatible implicit declaration of built-in function 'pow'
/in/foo.c:9:20: note: include '<math.h>' or provide a declaration of 'pow'
/in/foo.c:13:13: warning: missing terminating " character
      printf("%d\n” ,sn);
             ^
/in/foo.c:13:13: error: missing terminating " character
      printf("%d\n” ,sn);
             ^~~~~~~~~~~~~~
/in/foo.c:14:1: error: expected expression before '}' token
 }
 ^
/in/foo.c:14:1: error: expected ';' before '}' token