此程序修改ns2网络仿真器内的tcp.cc, 使之能符合ad hoc network内一个重要的TCP协议—ATCP. 本程序要放在ns2内, 配合ns2的环境执行. -NS2 network simulator within the tcp.cc. to enable it to meet the ad hoc network with an important TCP-ATCP. this procedure should be put on NS2, within NS2 implemen