如何在 C++ 中使用自动循环输入数字

Question

如何在 c++ 中使用自动循环输入数字

例如我有汉堡、油炸和苏打水的产品

#include <iostream>
#include <string>
#include <vector>


int main(){
    
    
    std::vector<std::string> products = {"burgers","fries","sodas"};
    std::vector<int> numbers = {};
    int a;
     for (auto n : products)
        std::cout <<"Enter number of "<< n << ": \n";
        std::cin >>a;
        numbers.push_back(a);

    return 0;
}

运行此代码后，这是输出

Enter number of burgers:
Enter number of fries:
Enter number of sodas:
1 // this is the only input

我想要这样的输出

   Enter number of burgers:
    1 // input
    Enter number of fries:
    1 // input
    Enter number of sodas:
    1 // input

Answer 1

您需要在整个循环体周围放置大括号。不像Python，缩进不标记循环体：

     for (auto n : products) {
        std::cout <<"Enter number of "<< n << ": " << std::endl;
        std::cin >> a;
        numbers.push_back(a);
     }