#include <stdio.h>
    void main()
    {
        int k = 5;
        int *p = &k;
        int **m  = &p;
        printf("%d%d%d\n", k, *p, **p);
    }

In function 'main':
Line 7: error: invalid type argument of 'unary *'
Line 3: warning: return type of 'main' is not 'int'