Input Stack Size 5000 C++ Stack!!!! Using IsEmpty And Isfull?

C++ stack!!!! using IsEmpty and Isfull? - input stack size 5000

I am new to the battery, I write a program stack spirit, usin fifth entry of the n elements of size, if the input or mor som ELEMNT not that size on the Riverside "complete" Sometimes I DNT KNW How do I not nthin empty, if it happens, help plz