View Compilation Error

0_0_12743945_19398.cpp: In function `double calc(P, P)':
0_0_12743945_19398.cpp:89: error: `m' undeclared (first use this function)
0_0_12743945_19398.cpp:89: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_12743945_19398.cpp: In function `int main()':
0_0_12743945_19398.cpp:118: error: expected primary-expression before '%' token
0_0_12743945_19398.cpp:118: error: expected primary-expression at end of input
0_0_12743945_19398.cpp:118: error: expected `;' at end of input
0_0_12743945_19398.cpp:118: error: expected `}' at end of input
0_0_12743945_19398.cpp:118: error: expected `}' at end of input