11、求数组的最大值与最小值int[] arr = { 1, 5, 9, 7, 10 };double max = arr[0];double min = arr[0];for (int i = 0; i < arr.Length; i++){if (arr[i] > max){max = arr[i];}if (arr[i] < min){min = arr[i];}}Console.WriteLine("最大值{0},最小值{1}", max,min);12、冒泡排序int[] arr1 = { 5, 10, 20, 30, 15, 25, 35 };for (int i = 0; i < arr1.Length - 1; i++){for (int j = 0; j < arr1.Length - i - 1; j++){if (arr1[j] < arr1[j + 1]){int tem = arr1[j];arr1[j] = arr1[j + 1];arr1[j + 1] = tem;}}}foreach (var item in arr1){Console.Write("{0},", item);}