View Compilation Error

0_0_36135277_4384.cpp: In function 'int main()':
0_0_36135277_4384.cpp:15:28: error: too many arguments to function 'int fun()'
         printf("%d\n",fun(n));
                            ^
0_0_36135277_4384.cpp:11:9: note: declared here
     int fun();
         ^