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C++ Integer Stack Implementation
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#include "istack2.h"

// Pop and return an integer.
int IntStack::pop()
        int ret = head->val;
        node *oldhead = head;
        head = head->next;
        delete oldhead;
        return ret;

// Print the stack on the stream.
void IntStack::print(ostream &strm) const
        strm << "[< ";
        if(head) head->printall(strm);
        strm << ">]";