View Compilation Error

1007560_0_0_26012.cpp: In function `int main(int, char**)':
1007560_0_0_26012.cpp:8: error: `lmax' undeclared (first use this function)
1007560_0_0_26012.cpp:8: error: (Each undeclared identifier is reported only once for each function it appears in.)
1007560_0_0_26012.cpp:13: error: `a' undeclared (first use this function)
1007560_0_0_26012.cpp:14: error: `b' undeclared (first use this function)
1007560_0_0_26012.cpp:21: error: `c' undeclared (first use this function)