View Compilation Error

0_0_11071059_21866.cpp: In function `int main()':
0_0_11071059_21866.cpp:11: error: `price' undeclared (first use this function)
0_0_11071059_21866.cpp:11: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11071059_21866.cpp:28: error: `dp' undeclared (first use this function)