View Compilation Error

178470_0_26992.cpp:5: error: `max' was not declared in this scope
178470_0_26992.cpp:7: error: `max' was not declared in this scope
178470_0_26992.cpp: In function `void cl()':
178470_0_26992.cpp:13: error: `a' undeclared (first use this function)
178470_0_26992.cpp:13: error: (Each undeclared identifier is reported only once for each function it appears in.)
178470_0_26992.cpp:17: error: `num' undeclared (first use this function)
178470_0_26992.cpp:23: error: `max' undeclared (first use this function)
178470_0_26992.cpp: In function `int main()':
178470_0_26992.cpp:37: error: `a' undeclared (first use this function)