public static void main(String[] args) {
int[][] a = new int[][] { { 100, 2, 5 }, { 4, 7, 6 }, { 17, 8, 9 } };
matrSum(a);
}
/*100 2 5
0 (0) (1) (2)
4 7 6
1 (0) (1) (2)
17 8 9
2 (0) (1) (2)
*/
private static void matrSum(int[][] a) {
int sum1 = 0;
int sum2 = 0;
for (int i = 0; i < a.length; i++)
for (int j = 0; j < a[i].length; j++) {
if (i == j) {
sum1 += a[i][j];
}
if (j == a.length - i - 1) {
sum2 += a[i][j];
}
}
System.out.println("矩阵对角线之和分别是:" + sum1 + "和" + sum2);
}
求一个3*3矩阵对角线元素之和
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转载自blog.csdn.net/weixin_42470710/article/details/84383506
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