编写c++程序,计算二维数组的每行元素之和,每列元素之和,对角线元素之和...答:={1,2,3,4,5,6,7,8,9};cout<<"原二维数组:"<<endl;PrintArray(a);cout<<"每行元素和:"<<endl;AddLine(a);cout<<"每列元素和:"<<endl;AddColumn(a);cout<<"对角线元素和:"<<endl;AddDiagonal(a);cout<<"斜对角线元素和:"<<endl;AddObliqueDiagonal(a);return 0;} 运行 ...