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17小时前关门了。
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void disProductList(std::vector<Food> vInfo) {
          int i = 0;
          std::ifstream file("Data-base.txt");
          std::string line;
    
        int main() {
          while (true) {
            int userInput;
            std::cout << "Choose one option from the list below." << 
     std::endl;
            std::cout << "1 - Display Product list. " << std::endl;
            std::cout << "2 - Add Products to the product list." << 
     std::endl;
            std::cout << "3 - Remove a Product from the product 
       list." << std::endl;
            std::cin >> userInput;
            switch (userInput)
            case 1:
              disProductList(vInfo);
            break;
          }
        }

我想这就是它，足够清楚了吗？我希望是。vInfo在这之后被用来将项目推回向量中。