View Compilation Error

0_0_12912259_29060.cpp: In function `void input()':
0_0_12912259_29060.cpp:39: error: `mm' undeclared (first use this function)
0_0_12912259_29060.cpp:39: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_12912259_29060.cpp: In function `int getmax(int, int)':
0_0_12912259_29060.cpp:53: error: `mm' undeclared (first use this function)
0_0_12912259_29060.cpp: In function `int main()':
0_0_12912259_29060.cpp:64: error: `mm' undeclared (first use this function)