View Compilation Error

0_0_8033298_12779.cpp: In function `int main()':
0_0_8033298_12779.cpp:11: error: `mi_x' undeclared (first use this function)
0_0_8033298_12779.cpp:11: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8033298_12779.cpp:11: error: `mi_y' undeclared (first use this function)
0_0_8033298_12779.cpp:11: error: `ma_x' undeclared (first use this function)
0_0_8033298_12779.cpp:11: error: `ma_y' undeclared (first use this function)