<table border="1" width="200" cellspacing="1" cellpadding="1"><tbody><tr><td>0</td><td>3</td><td>6</td><td>10</td></tr><tr><td>2</td><td>5</td><td>9</td><td>11</td></tr><tr><td>5</td><td>7</td><td>10</td><td>13</td></tr><tr><td>6</td><td>8</td><td>14</td><td>18</td></tr></tbody></table><pre name="code" class="cpp"><span style="font-size:18px;">#include <iostream>
using namespace std;
bool Find(int* arr, int rows, int columns, int key)//傳值要將行列都傳進來
{
bool sign = false;//定義一個標誌
if (arr != NULL && rows > 0 && columns > 0)
{
int row = 0;
int column = columns - 1;
while (row < rows &&column >= 0)//從右上角開始查找
{
if (arr[row*columns + column] == key)
{
sign = true;
break;
}
else if (arr[row*columns + column] < key)//小於key,向下一行查找
{
row++;
}
else
{
column--; //大於key,向前一列查找
}
}
}
return sign;
}
int main()
{
int arr[][4] =
{ { 0, 3, 6, 10 },
{ 2, 5, 9, 11 },
{ 5, 7, 10, 13 },
{ 6, 8, 14, 18 } };
bool ret1 = Find((int*)arr, 4, 4, 7);//將二級指針強轉爲一級指針
cout << "ret1=" << ret1 << endl;
bool ret2 = Find((int*)arr, 4, 4, 100);
cout << "ret2=" << ret2 << endl;
bool ret3 = Find((int*)arr, 4, 4, 6);
cout << "ret3=" << ret3 << endl;
bool ret4 = Find((int*)arr, 4, 4, 6);
cout << "ret4=" << ret4 << endl;
system("pause");
return 0;
}</span>
在寫這個代碼的時候出現的問題:函數傳二級指針時,開始直接傳的(int**)arr類型,發現不可以這樣傳,然後強轉爲(int*)arr,再傳入行數和列數。