/* 二分查找实现 */ #include <iostream> using namespace std; int BinarySearch(int *pnArr, int nLen, int nValue) { if (pnArr == NULL || nLen < 1) { return -1; } int nLeft = 0; int nRight = nLen - 1; while (nLeft <= nRight) { int nMid = nLeft + (nRight - nLeft) / 2; if (pnArr[nMid] == nValue) { return nMid; } else if (pnArr[nMid] > nValue) { nRight = nMid - 1; } else { nLeft = nMid + 1; } } return -1; } int main() { int nArr[] = {1,2,5,7,9,11,14,16,19}; int nLen = sizeof(nArr) / sizeof(int); int Result = BinarySearch(nArr, nLen, 21); if (Result != -1) { cout<<"找到该数据在数组的下标为:"<<Result<<endl; } else { cout<<"没有该数据"<<endl; } system("pause"); return 0; }
代码下载地址:http://download.csdn.net/detail/yincheng01/6704519
解压密码:c.itcast.cn
下载代码并解压后,用VC2013打开interview.sln,并设置对应的启动项目后,点击运行即可,具体步骤如下:
1)设置启动项目:右键点击解决方案,在弹出菜单中选择“设置启动项目”
2)在下拉框中选择相应项目,项目名和博客编号一致
3)点击“本地Windows调试器”运行