#include #include "c_stack.h" main() { Stack s; int i; s = new_stack(); stack_push(s, new_jval_i(1)); stack_push(s, new_jval_i(2)); stack_push(s, new_jval_i(3)); i = jval_i(stack_pop(s)); printf("First pop: %d\n", i); i = jval_i(stack_pop(s)); printf("Second pop: %d\n", i); free_stack(s); }