View Compilation Error

0_0_4863706_12036.cpp: In function `void dp()':
0_0_4863706_12036.cpp:12: error: pointer to a function used in arithmetic
0_0_4863706_12036.cpp:12: error: pointer to a function used in arithmetic
0_0_4863706_12036.cpp:12: error: assignment of read-only location
0_0_4863706_12036.cpp:12: error: cannot convert `int' to `void ()()' in assignment