C++ How to read string from file into std::string variable with file is FILE's pointer

I want to read the string from file input into a std::string variable.

I declare a FILE pointer to open file:

FILE *f = fopen("IN.txt","r");

And then, I read using fscanf() function:

std::string tempStr;

fscanf(f,"%s",tempStr); //Compile Error

//fscanf(f,"%s",&tempStr);//Runtime Error

So, I have 2 question:

1. Is it possible to fix the problem above (Still use FILE *f and fscanf() function)?

2. I'm a C programmer, new to C++. How to solve this problem with the different way?

Here is my code:

#include <iostream>
#include <string>
using namespace std;

int main()
{
    int n;
    string cities[100];
    FILE * f = fopen("IN.txt", "r");
    fscanf(f,"%d",&n);
    for (int i=0; i<n;i++)
    {
        string tempStr;
        fscanf(f,"%s",tempStr);
        cities[i] = tempStr;
    }
    return 0;
}

And the input file (first line is numbers of line):

8
Vancouver
Yellowknife
Edmonton
Calgary
Winnipeg
Toronto
Montreal
Halifax