View Compilation Error

0_0_2572344_23791.cpp: In member function `Ma Ma::operator^(int)':
0_0_2572344_23791.cpp:43: error: `One' undeclared (first use this function)
0_0_2572344_23791.cpp:43: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2572344_23791.cpp: At global scope:
0_0_2572344_23791.cpp:55: error: `Ma One' used prior to declaration