{
  "type": "code_options",
  "author": "csdn.net",
  "source": "solution.md",
  "exercise_id": "83ff4228dbc34fa3b8d9ebad0abda73b",
  "keywords": "算法初阶,基础知识,分治策略,证明主定理,对b的幂证明主定理",
  "title": "矩阵问题",
  "desc": [
    {
      "content": "\n题目描述\n编写以下函数：\n（1）在一个二维数组中形成以下形式的n阶矩阵：\n[1 1 1 1 1\n2 1 1 1 1\n3 2 1 1 1\n4 3 2 1 1\n5 4 3 2 1]\n（2）去掉靠边的元素，生成新的n-2阶矩阵；\n（3）求生成的n阶矩阵主对角线上的元素之和；\n（4）以方阵形式输出数组。\n在main函数中调用以上函数进行测试。\n输入\n输入生成矩阵的阶数(n>=2)\n输出\n以方阵形式输出生成的n阶矩阵、去掉靠边的元素生成的新的n-2阶矩阵、以及生成的n阶矩阵主对角线上的元素之和，最后一行要回车\n样例输入\n5\n样例输出\nGenerated matrix:\n1 1 1 1 1\n2 1 1 1 1\n3 2 1 1 1\n4 3 2 1 1\n5 4 3 2 1\ndel the elements on the side:\n1 1 1\n2 1 1\n3 2 1\nThe sum of the diagonal:5",
      "language": "markdown"
    }
  ],
  "answer": [
    {
      "content": "",
      "language": "cpp"
    }
  ],
  "prepared": [
    [
      {
        "content": "",
        "language": "cpp"
      }
    ],
    [
      {
        "content": "",
        "language": "cpp"
      }
    ],
    [
      {
        "content": "",
        "language": "cpp"
      }
    ]
  ],
  "template": {
    "content": "#include <iostream>\nusing namespace std; \nint main() {\n\twhile(1){\n\t\tint a;\n\t\tcin>>a;\n\t\tint array[a][a];\n\t\tfor (int i=0;i<a;i++)\n\t\t\tfor (int j=0;j<a;j++)\n\t\t\t{\n\t\t\t\tif(j<i)\n\t\t\t\t\tarray[i][j]=i+1-j;\n\t\t\t\telse \n\t\t\t\t\tarray[i][j]=1;\n\t\t\t}\n\t\tcout<<\"Generated matrix:\"<<endl; \n\t\tfor (int i=0;i<a;i++)\n\t\t{\t\n\t\t\tfor (int j=0;j<a;j++)\n\t\t\t{\n\t\t\t\tcout<<array[i][j];\n\t\t\t}\n\t\t\tcout<<endl;\n\t\t}\n\t\tcout<<\"del the elements on the side:\"<<endl; \n\t\tfor (int i=1;i<a-1;i++)\n\t\t{\t\n\t\t\tfor (int j=1;j<a-1;j++)\n\t\t\t{\n\t\t\t\tcout<<array[i][j];\n\t\t\t}\n\t\t\tcout<<endl;\n\t\t}\n\t\tint sum=0;\n\t\tint i,j;\n\t\tfor (i = a - 2 ,j = 1 ; i >= 1 ; i-- , j++)\n\t\t{\t\n\t\t\tsum+=array[i][j];\n\t\t}\n\t\tcout<<\"The sum of the diagonal:\"<<sum<<endl;\n\t}\n\treturn 0;\n}",
    "language": "cpp"
  },
  "node_id": "dailycode-5d88f5aea60b4d6e9dbd83c13e22993f",
  "license": "csdn.net",
  "created_at": 1637894158,
  "topic_link": "https://bbs.csdn.net/topics/600469848"
}