C ++文件输入在线读取3个整数

Question

so I have a file for C++ that I am reading in. It has 3 ints 4 4 16 looks like that. I'm curious as to how I go about getting this all read into 3 variables that I have cars carCapacity people

I have set up two different ways of trying to get them but neither are working. I just get an infinite loop

fin >> cars >> carCapacity >> people; Is one way that I'm trying to store the input. another was:

fin >> cars;

fin >> carCapacity

fin >> people

I'm using an ifstream to get the file, I check to make sure that there is a file and then I use while(!fin.eof()) to loop the entire txt file. Any help would be greatly appreciated. Thanks in advance!

Answer 1

The easiest way is to use "freeopen"

file: a.txt
1 2 3

#include <iostream>
#include <stdio.h>
using namespace std;

int main(){
   freeopen("a.txt", "r", stdin);
   int a, b, c;
   std::cin >> a >> b >> c;
   std::cout << a << b << c;
}

P/s: I don't test