View Compilation Error

0_0_32678766_28920.cpp: In function 'int dir(char)':
0_0_32678766_28920.cpp:9:17: error: 'int dir(char)' redeclared as different kind of symbol
 int dir (char ch) {
                 ^
0_0_32678766_28920.cpp:4:11: note: previous declaration 'const int dir [4][2]'
 const int dir[4][2] = {{-1, 0}, {0, -1}, {1, 0}, {0, 1}};
           ^
0_0_32678766_28920.cpp: In function 'int main()':
0_0_32678766_28920.cpp:44:25: error: 'dir' cannot be used as a function
         r[0].d = dir(str);
                         ^
0_0_32678766_28920.cpp:46:25: error: 'dir' cannot be used as a function
         r[1].d = dir(str);
                         ^