how to tell compiler to do "range based for loop" in string vector?-CodePudding

I have created a string vector and want to fill it with a "range-based for loop" but it doesn't work. What am I doing wrong?

invalid initialization of reference of type ‘int&’ from expression of type ‘std::__cxx11::basic_string<char>’

Does the compiler not understand that I want to refer to a vector element, not a string?

When I used the classic "for loop" it worked correctly (I could access the desired element of the vector and write the value there), but I don't understand why it doesn't work with a range based for loop. My piece of code:

#include <iostream>
#include <vector>

typedef std::vector<std::string> massive;
using std::cin, std::cout, std::endl;

int main() {
    int N = 0, M = 0;
    std::string s_n = "";

    cin >> N;

    massive seats(N);
    
    for (int& i: seats) {
        cin >> s_n;
        seats[i] = s_n;
    }

    return 0;
}

CodePudding user response：

Replace the loop with

for (std::string& s : seats) {
    cin >> s;
}

In short, here s is a reference that runs over seats elements.