无法在Xcode中使用ifstream [英] Cannot use ifstream in Xcode

问题描述

我是C ++的新手，并且到处都在研究它，似乎无法弄清楚如何编译它，也不知道为什么.它可以在Visual C ++中工作，但不能在Xcode中工作.错误似乎在输入流上.有什么建议?

I am new to C++ and have researched this everywhere and cannot seem to figure out how to compile this and have not idea why. It works in visual C++ but not Xcode. The error seems to be on the input stream. Any suggestions?

错误读取-未定义模板'std :: _ basic_ifstream>的隐式实例化"

Error reads - "Implicit instantiation of undefined template 'std::_basic_ifstream >'

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

int main()
{
    cout  << "The file is providing the data.";
    ifstream myFile("/Users/me/Desktop/somewords.txt"); // * error

    int i;
    string s;
    double d;
    myFile >> i >> s >> d;
    cout << "here is your data " << endl;
    cout << i << endl << s << endl << d << endl;


    return 0;
}

推荐答案

您忘记了#include <fstream>，它实际上是定义所有ifstream优点的头文件.您两次(或至少尝试过)包含<iostream>，也许其中一个是<fstream>?

You forgot to #include <fstream>, the header file that actually defines all your ifstream goodness. You included <iostream> twice (or at least tried to), perhaps one of those was meant to be <fstream>?

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