从 C++ 中的文本文件读取后，如何对值求和？

Question

我想弄清楚如何对随机数生成器生成的值求和。

下面我的代码写入随机数并读取它，并输出所有随机数。

我根本不知道如何对随机数生成的值求和。

#include <iostream>
#include <cstdlib>
#include <fstream>
#include <string>

using namespace std;

class Array
{
public:
    void Arrayoutput()
    {
        string array[1000]; // creates array to hold names
        short loop=0; //short for loop for input
        string line; //this will contain the data read from the file

        ifstream myfile ("Asg4.txt"); //opening the file.

        if (myfile.is_open()) //if the file is open
        {
            while (! myfile.eof() ) //while the end of file is NOT reached
            {
                getline (myfile,line); //get one line from the file
                array[loop]= line;
                cout << array[loop] << endl; //and output it
                loop++;
            }

            myfile.close(); //closing the file
        }
        else cout << "Unable to open file"; //if the file is not open output
    }
};

int main()
{
    Array Array1;
    ofstream myfile;

    myfile.open ("Asg4.txt");

    for (int i = 0; i < 1000; i++) //random number generator
    {
        myfile << 1+(rand()%1000) << endl;
    }
    myfile.close();

    Array1.Arrayoutput();

    return 0;
}

Answer 1

这是从文件中读取数字并将它们相加的方法

ifstream myfile ("Asg4.txt"); //opening the file.
int total = 0;
int number;
while (myfile >> number)
    total += number;
cout << "The total is " << total << "n";