后缀表达式c++实现代码

std::string src = argc > 1 ? argv[1] : "12+((2+73)*4)-15"; std::cout << "src: " << src << std::endl; Expression expression; Expression::PrefixType result; int ret = expression.ToPrefix(src, result); if (ret != 0) { std::cout << src << " ToPrefix Error." << std::endl; return 1; } std: