[英]How do you sum the values after reading from text file in C++?
我試圖弄清楚如何對從隨機數生成器生成的值求和。
在我的代碼下面,寫入並讀取隨機數,然后輸出所有隨機數。
我根本無法弄清楚如何將隨機數生成的值相加。
#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;
}
這是從文件中讀取數字並將其相加的方法
ifstream myfile ("Asg4.txt"); //opening the file.
int total = 0;
int number;
while (myfile >> number)
total += number;
cout << "The total is " << total << "n";
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