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import java.io.*;
import java.util.*;
import static java.lang.System.out;
public class Main {
public static void main(String argv[]) {
Scanner cin = new Scanner(System.in);
out.print("一共几个数:");
int s = 0, len = cin.nextInt();
out.println("依次输入" + len + "个数");
for (int i = 0; i < len; i++) {
s += cin.nextInt();
}
out.println("平均数:" + (1.0 * s / len));
}
}
import java.io.*;
import java.util.*;
public class Main
{
public static void main(String argv[])
{
Scanner cin = new Scanner(System.in);
System.out.print("一共几个数:");
int len = cin.nextInt();
int s = 0;
System.out.println("依次输入" + len + "个数");
for (int i = 0; i < len; i++)
s += cin.nextInt();
System.out.println("平均数:" + (1.0 * s / len));
}
}