}

}

System.out.println("请输入10个数"); double num[] = new double[10];

BufferedReader br = new BufferedReader(new String str;

for (int i = 0; i < 10; i++) { }

for (int j = 1; j < 10; j++) { //冒泡排序 }

System.out.println("顺序为:"); for (int k = 0; k < 10; k++) { }

System.out.print(num[k]+" "); for (int i = 0; i < 10 - j; i++)

if (num[i] > num[i + 1]) { }

t = num[i];

num[i] = num[i + 1]; num[i + 1] = t;

str = br.readLine();

num[i] = Double.parseDouble(str);

InputStreamReader(System.in));

(2) 求一个3*3矩阵对角元素之和。 package com.zhangqian.exercise1;