foo.cc: In function 'int main()':
foo.cc:9:17: warning: format '%f' expects argument of type 'float*', but argument 2 has type 'double*' [-Wformat=]
    9 |         scanf("%f",&k);
      |                ~^  ~~
      |                 |  |
      |                 |  double*
      |                 float*
      |                %lf
foo.cc:14:29: error: expected ';' before '}' token
   14 |             printf("%.2f",n)}
      |                             ^
      |                             ;

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