View Compilation Error

0_0_8006461_3249.cpp:11: error: expected constructor, destructor, or type conversion before ';' token
0_0_8006461_3249.cpp: In function `int main()':
0_0_8006461_3249.cpp:30: error: `dp' undeclared (first use this function)
0_0_8006461_3249.cpp:30: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8006461_3249.cpp:33: error: `d' undeclared (first use this function)