View Compilation Error

576261_0_0_26807.cpp: In function `int main()':
576261_0_0_26807.cpp:20: error: `ma' undeclared (first use this function)
576261_0_0_26807.cpp:20: error: (Each undeclared identifier is reported only once for each function it appears in.)
576261_0_0_26807.cpp:20: error: `m2' undeclared (first use this function)