Program in C++ for Exception Handling

#include <cstdlib>
#include <iostream>
#include <assert.h>

const int SIZE = 100;  
class error {
    public:
        const string z;      
        error(const string& w) z(w) {}
};
class stack {
    private:
        int C;              
        int info[SIZE];   
    public:
     stack(): C(0) {};
        void push(const int item) throw(error);
  int pop() throw(error);
};
inline void stack::push(const int item) throw(error)
{
    if ((C < 0) &&
           (C >= sizeof(info)/sizeof(info[0]))) {
        throw("Push overflows stack");
    }
    info[C] = item;
    ++C;
}
inline int stack::pop(  ) throw(error)
{
    --C;

    if ((C < 0) &&
           (C >= sizeof(info)/sizeof(info[0]))) {
        throw("Pop underflows stack");
    }
    return (info[C]);
}
static stack tstack; 
static void push_s(  ) {
   int i;      
    for (i = 0; i < 5000; i++) {
        tstack.push(i);
    }
}

int main()
{
    try {
       push_s();
    }
    catch (error& err) {
       cerr << "Error: Bounds exceeded\n";
       cerr << "Reason: " << err.z << '\n';
       exit (8);
    }
    catch (...) {
       cerr << "Error: Unexpected exception occurred\n";
       exit (8);
    }
    return (0);
}