public class LianXi3 {
public static void main(String[] args) {
int arr[][] = new int[][]{{1,4,7,5},{6,2,3,7}};
int sum = 0;
System.out.println("二维数组中个元素的和是：");
for(int i = 0; i <arr.length;i++){
for(int j = 0; j <arr[i].length;j++){
if(j ==3){
System.out.print(arr[i][j]+"=");
}else{
System.out.print(arr[i][j]+"+");
}
sum = sum + arr[i][j];
}
}
System.out.println(sum);
}
}