foo.c: In function 'main':
foo.c:5:17: warning: format '%f' expects argument of type 'float *', but argument 2 has type 'int *' [-Wformat=]
    5 |         scanf("%f%f%f",&a,&m,&k);
      |                ~^      ~~
      |                 |      |
      |                 |      int *
      |                 float *
      |                %d
foo.c:5:19: warning: format '%f' expects argument of type 'float *', but argument 3 has type 'int *' [-Wformat=]
    5 |         scanf("%f%f%f",&a,&m,&k);
      |                  ~^       ~~
      |                   |       |
      |                   float * int *
      |                  %d
foo.c:5:21: warning: format '%f' expects argument of type 'float *', but argument 4 has type 'int *' [-Wformat=]
    5 |         scanf("%f%f%f",&a,&m,&k);
      |                    ~^        ~~
      |                     |        |
      |                     float *  int *
      |                    %d
foo.c:13:28: warning: format '%f' expects argument of type 'double', but argument 2 has type 'int' [-Wformat=]
   13 |                 printf("%.2f",(a/20-m)*k);
      |                         ~~~^  ~~~~~~~~~~
      |                            |          |
      |                            double     int
      |                         %.2d

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