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The top level file, calc++.cc, poses no problem.
#include <iostream> #include "driver.hh"
int main (int argc, char *argv[]) { int res = 0; driver drv; for (int i = 1; i < argc; ++i) if (argv[i] == std::string ("-p")) drv.trace_parsing = true; else if (argv[i] == std::string ("-s")) drv.trace_scanning = true; else if (!drv.parse (argv[i])) std::cout << drv.result << '\n'; else res = 1; return res; }