View Compilation Error

0_0_17388104_22710.cpp: In function 'int main()':
0_0_17388104_22710.cpp:47:16: error: invalid conversion from 'int*' to 'unsigned int*' [-fpermissive]
   h1 = hash(&h2);
                ^
0_0_17388104_22710.cpp:3:14: note: initializing argument 1 of 'unsigned int hash(unsigned int*)'
 unsigned int hash(unsigned int * hw)
              ^
0_0_17388104_22710.cpp:48:16: error: invalid conversion from 'int*' to 'unsigned int*' [-fpermissive]
   h3 = hash(&h4);
                ^
0_0_17388104_22710.cpp:3:14: note: initializing argument 1 of 'unsigned int hash(unsigned int*)'
 unsigned int hash(unsigned int * hw)
              ^
0_0_17388104_22710.cpp:51:10: error: expected '}' at end of input
  return 0;
          ^