因此，我必须创建这个程序，从文件中读取多个“工资”，然后将所有工资相加以返回一个“总工资”，并计算所有工资的平均值。
我目前拥有的代码如下:
package uploadTask7_countingSalaries;
//import utilities needed for the program
import java.util.Scanner;
import java.io.File;
public class countingSalaries {
public static void main(String[] args) throws Exception {
// defines the file that data will be read from
File salaryFile = new File("salaries.txt");
// creates scanner object to read data from file
Scanner scanFile = new Scanner (salaryFile);
// creates while loop to read and print data to the user
while(scanFile.hasNextDouble()) {
double i = scanFile.nextDouble();
System.out.println(i); }
double addedSalary = scanFile.nextDouble();
double sumofSalary = 0.0;
while(scanFile.hasNextDouble()) {
sumofSalary += addedSalary;
addedSalary++; }
System.out.println("Total salary is: " + addedSalary);
}
}
到目前为止，我已经能够从文本文件中读取工资并将其打印给用户。我正在努力寻找一种方法来使用循环将所有数字相加/计算外部文件的平均值。
最佳答案
我会这样做。看来您正在尝试迭代两次而不重置迭代器。
package uploadTask7_countingSalaries;
//import utilities needed for the program
import java.util.Scanner;
import java.io.File;
public class countingSalaries {
public static void main(String[] args) throws Exception {
List<Double> salaries = new ArrayList<Double>();
// defines the file that data will be read from
File salaryFile = new File("salaries.txt");
// creates scanner object to read data from file
Scanner scanFile = new Scanner (salaryFile);
// creates while loop to read and print data to the user
while(scanFile.hasNextDouble()) {
double i = scanFile.nextDouble();
salaries.add(i);
System.out.println(i); }
double total = 0;
for(double a : salaries){
total = total + a;
}
System.out.println("Total salary is: " + total);
System.out.println("Avg = " + total/salaries.size();
}
}
关于java - 在循环中将所有 double 相加，Java，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/46961950/