#include <dummy.h> #include "esp_camera.h" #include <WiFi.h> #define CAMERA_MODEL_AI_THINKER #include "camera_pins.h" const char* ssid = "666"; const char* password = "qqljc123"; void startCameraServer(); void setup() { Serial.begin(115200); Serial.setDebugOutput(true); Serial.println(); camera_config_t config; config.ledc_channel = LEDC_CHANNEL_0; config.ledc_timer = LEDC_TIMER_0; config.pin_d0 = Y2_GPIO_NUM; config.pin_d1 = Y3_GPIO_NUM; config.pin_d2 = Y4_GPIO_NUM; config.pin_d3 = Y5_GPIO_NUM; config.pin_d4 = Y6_GPIO_NUM; config.pin_d5 = Y7_GPIO_NUM; config.pin_d6 = Y8_GPIO_NUM; config.pin_d7 = Y9_GPIO_NUM; config.pin_xclk = XCLK_GPIO_NUM; config.pin_pclk = PCLK_GPIO_NUM; config.pin_vsync = VSYNC_GPIO_NUM; config.pin_href = HREF_GPIO_NUM; config.pin_sscb_sda = SIOD_GPIO_NUM; config.pin_sscb_scl = SIOC_GPIO_NUM; config.pin_pwdn = PWDN_GPIO_NUM; config.pin_reset = RESET_GPIO_NUM; config.xclk_freq_hz = 20000000; config.pixel_format = PIXFORMAT_JPEG; if(psramFound()){ config.frame_size = FRAMESIZE_UXGA; config.jpeg_quality = 10; config.fb_count = 2; } else { config.frame_size = FRAMESIZE_SVGA; config.jpeg_quality = 12; config.fb_count = 1; } #if defined(CAMERA_MODEL_ESP_EYE) pinMode(13, INPUT_PULLUP); pinMode(14, INPUT_PULLUP); #endif esp_err_t err = esp_camera_init(&config); if (err != ESP_OK) { Serial.printf("Camera init failed with error 0x%x", err); return; } sensor_t * s = esp_camera_sensor_get(); if (s->id.PID == OV3660_PID) { s->set_vflip(s, 1); s->set_brightness(s, 1); s->set_saturation(s, -2); } s->set_framesize(s, FRAMESIZE_QVGA); #if defined(CAMERA_MODEL_M5STACK_WIDE) || defined(CAMERA_MODEL_M5STACK_ESP32CAM) s->set_vflip(s, 1); s->set_hmirror(s, 1); #endif WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println(""); Serial.println("WiFi connected"); startCameraServer(); Serial.print("Camera Ready! Use 'http://"); Serial.print(WiFi.localIP()); Serial.println("' to connect"); } void loop() { delay(10000); } 每句代码具体意思解释

#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <sys/socket.h> #include <netinet/ip.h> #define PORT 9090 /* Changing this size will change the layout of the stack. * We have added 2 dummy arrays: in main() and myprintf(). * Instructors can change this value each year, so students * won’t be able to use the solutions from the past. * Suggested value: between 0 and 300 / #ifndef DUMMY_SIZE #define DUMMY_SIZE 100 #endif char secret = "A secret message\n"; unsigned int target = 0x11223344; void myprintf(char msg) { uintptr_t framep; // Copy the ebp value into framep, and print it out asm("movl %%ebp, %0" : "=r"(framep)); printf("The ebp value inside myprintf() is: 0x%.8x\n", framep); / Change the size of the dummy array to randomize the parameters for this lab. Need to use the array at least once */ char dummy[DUMMY_SIZE]; memset(dummy, 0, DUMMY_SIZE); // This line has a format string vulnerability printf(msg); printf("The value of the ’target’ variable (after): 0x%.8x\n", target); }

这段代码存在一个格式化字符串漏洞，容易受到攻击者的利用。攻击者可以通过特殊的格式化字符串来读取或写入内存中的任意位置。具体来说，攻击者可以在传递给myprintf()函数的字符串中添加%c或%s等特殊字符，来读取...

解释代码#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <sys/socket.h> #include <netinet/ip.h> #define PORT 9090 /* Changing this size will change the layout of the stack. * We have added 2 dummy arrays: in main() and myprintf(). * Instructors can change this value each year, so students * won't be able to use the solutions from the past. * Suggested value: between 0 and 300 / #ifndef DUMMY_SIZE #define DUMMY_SIZE 100 #endif char secret = "A secret message\n"; unsigned int target = 0x11223344; void myprintf(char msg) { uintptr_t framep; // Copy the ebp value into framep, and print it out asm("movl %%ebp, %0" : "=r"(framep)); printf("The ebp value inside myprintf() is: 0x%.8x\n", framep); / Change the size of the dummy array to randomize the parameters for this lab. Need to use the array at least once / char dummy[DUMMY_SIZE]; memset(dummy, 0, DUMMY_SIZE); // This line has a format-string vulnerability printf(msg); printf("The value of the 'target' variable (after): 0x%.8x\n", target); } / This function provides some helpful information. It is meant to * simplify the lab tasks. In practice, attackers need to figure * out the information by themselves. */ void helper() { printf("The address of the secret: 0x%.8x\n", (unsigned) secret); printf("The address of the 'target' variable: 0x%.8x\n", (unsigned) &target); printf("The value of the 'target' variable (before): 0x%.8x\n", target); }

该函数中还使用了一个名为 dummy 的数组，在函数内部没有实际用途，只是为了随机化函数参数。在函数中还打印了 ebp 的值，以便在后面的漏洞利用中定位栈帧。同时，该代码还定义了一个名为 helper 的函数，用于...

#include <stdio.h> #include <stdlib.h> struct ListNode { int data; struct ListNode next; }; struct ListNode readlist(); struct ListNode deletem( struct ListNode L, int m ); void printlist( struct ListNode L ) { struct ListNode p = L; while (p) { printf("%d ", p->data); p = p->next; } printf("\n"); } int main() { int m; struct ListNode L = readlist(); scanf("%d", &m); L = deletem(L, m); printlist(L); return 0; } / 你的代码将被嵌在这里 */

#include <stdio.h> #include <stdlib.h> struct ListNode { int data; struct ListNode *next; }; // 读取链表 struct ListNode *readlist() { int n; scanf("%d", &n); struct ListNode *head = NULL, *...

检查代码问题#include <stdio.h> #include <stdlib.h> typedef struct ListNode { int val; struct ListNode* next; } ListNode; ListNode* createList(int n) { ListNode* head = NULL; ListNode* tail = NULL; ListNode* p = NULL; for (int i = 0; i < n; i++) { p = (ListNode)malloc(sizeof(ListNode)); scanf("%d", &(p->val)); p->next = NULL; if (head == NULL) { head = p; tail = p; } else { tail->next = p; tail = p; } } return head; } ListNode removeElements(ListNode* head, int val) { ListNode* dummy = (ListNode)malloc(sizeof(ListNode)); dummy->val = 0; dummy->next = head; ListNode p = dummy; while (p->next) { if (p->next->val == val) { ListNode* tmp = p->next; p->next = tmp->next; free(tmp); } else { p = p->next; } } head = dummy->next; free(dummy); return head; } void printList(ListNode* head) { while (head) { printf("%d ", head->val); head = head->next; } } int main() { int n, val; scanf("%d", &n); ListNode* head = createList(n); scanf("%d", &val); head = removeElements(head, val); printList(head); return 0; }

这段代码看起来没什么问题。但是有两个小的建议： 1. 在 createList 函数中，当...2. 在 removeElements 函数中，dummy 节点的 val 域赋值为 0 是没有必要的，因为在删除链表元素时，不涉及到 val 域的值。

用C语言改写，将打印输出的结果中重复的数去掉#include <stdio.h>#include <stdlib.h>struct ListNode { int val; struct ListNode next;};struct ListNode mergeList(struct ListNode* l1, struct ListNode* l2){ struct ListNode* dummy = (struct ListNode)malloc(sizeof(struct ListNode)); // 新建一个虚拟头节点 dummy->val = 0; dummy->next = NULL; struct ListNode cur = dummy; while (l1 && l2) { if (l1->val <= l2->val) { cur->next = l1; l1 = l1->next; } else { cur->next = l2; l2 = l2->next; } cur = cur->next; } if (l1) cur->next = l1; // 将剩余的节点加入到新链表中 if (l2) cur->next = l2; return dummy->next;}int main() { int n, m, num; scanf("%d%d", &n, &m); struct ListNode* l1 = (struct ListNode)malloc(sizeof(struct ListNode)); struct ListNode l2 = (struct ListNode)malloc(sizeof(struct ListNode)); struct ListNode p1 = l1; struct ListNode* p2 = l2; for (int i = 0; i < n; i++) { scanf("%d", &num); p1->next = (struct ListNode)malloc(sizeof(struct ListNode)); p1->next->val = num; p1->next->next = NULL; p1 = p1->next; } for (int i = 0; i < m; i++) { scanf("%d", &num); p2->next = (struct ListNode)malloc(sizeof(struct ListNode)); p2->next->val = num; p2->next->next = NULL; p2 = p2->next; } struct ListNode* res = mergeList(l1->next, l2->next); while (res) { printf("%d ", res->val); res = res->next; } return 0;}

#include <stdio.h> #include <stdlib.h> struct ListNode { int val; struct ListNode *next; }; struct ListNode* mergeList(struct ListNode* l1, struct ListNode* l2){ struct ListNode* dummy = (struct ...

2、下面的函数可以判断一个字符串是否是一个float类型的实数，请将它修改为模板，以便可以用于double实数的判断。原函数： #include<sstream> using namespace std; bool isFloat(string s){ istringstream iss(s); flaot dummy; iss>>noskipws>>dummy; return iss && iss.eof(); }

#include <sstream> #include <string> using namespace std; template <typename T> bool isFloat(const string& s) { istringstream iss(s); T dummy; iss >> noskipws >> dummy; return iss && iss.eof(); ...

#include <iostream> using namespace std; struct ListNode { int val; ListNode* next; ListNode(int x) : val(x), next(NULL) {} }; ListNode* mergeTwoLists(ListNode* l1, ListNode* l2) { ListNode* dummy = new ListNode(0); ListNode* cur = dummy; while (l1 && l2) { if (l1->val <= l2->val) { cur->next = l1; l1 = l1->next; } else { cur->next = l2; l2 = l2->next; } cur = cur->next; } if (l1) { cur->next = l1; } else { cur->next = l2; } return dummy->next; } int main() { ListNode* l1 = new ListNode(1); l1->next = new ListNode(3); l1->next->next = new ListNode(5); ListNode* l2 = new ListNode(2); l2->next = new ListNode(4); l2->next->next = new ListNode(6); ListNode* merged = mergeTwoLists(l1, l2); while (merged) { cout << merged->val << " "; merged = merged->next; } return 0; }将这段代码中的有序表改成可自己输入

#include <iostream> using namespace std; struct ListNode { int val; ListNode* next; ListNode(int x) : val(x), next(NULL) {} }; ListNode* mergeTwoLists(ListNode* l1, ListNode* l2) { ListNode* ...

#include <iostream> using namespace std;// 定义单链表结构体 struct ListNode { int val; ListNode* next; ListNode(int x) : val(x), next(NULL) { } }; // 定义单链表基本操作函数 class LinkedList { public: // 合并两个有序链表 static ListNode* mergeTwoLists(ListNode* l1, ListNode* l2) { ListNode dummy(0); ListNode* tail = &dummy; while (l1 && l2) { if (l1->val < l2->val) { tail->next = l1; l1 = l1->next; } else { tail->next = l2; l2 = l2->next; } tail = tail->next; } tail->next = l1 ? l1 : l2; return dummy.next; } }; int main() {// 定义两个有序链表 ListNode* l1 = new ListNode(1); l1->next = new ListNode(2); l1->next->next = new ListNode(4); ListNode* l2 = new ListNode(1); l2->next = new ListNode(3); l2->next->next = new ListNode(4); // 合并两个有序链表 ListNode* mergedList = LinkedList::mergeTwoLists(l1, l2); // 输出结果 while (mergedList) { cout << mergedList->val << " "; mergedList = mergedList->next; } cout << endl; return 0; }详细注释

#include <iostream> using namespace std; // 定义单链表结构体 struct ListNode { int val; // 存储节点的值 ListNode* next; // 指向下一个节点的指针 // 构造函数 ListNode(int x) : val(x), next(NULL) {...

dummy.h头文件

#define DUMMY_H #include <iostream> #include <string> class Dummy { public: Dummy(); ~Dummy(); void printMessage(const std::string& message); private: int m_dummyValue; }; #endif /* DUMMY_H *...

代码解释：void CopleyAmplifier::SetNewPVTMotionStartTime(boost::posix_time::ptime time,CouchTrjType pvt_point) { //Record the time stamp and data. m_bool_pvt_started = true; m_start_motion_time_us = PosixTime2Integer<unsigned long long>(time); m_last_pvt_data.p = m_start_pos; //Send the last dummy data calculated by the motion start time. ptime current_time = microsec_clock::universal_time(); ptime couch_time = Integer2PosixTime<unsigned long long>(pvt_point.t, current_time); ptime couch_to_L1_time = Integer2PosixTime<unsigned long long>(pvt_point.timeReachToBuffer, current_time); unsigned char next_point_time = round((pvt_point.t-m_start_motion_time_us)/1000.0)-m_total_motion_time_ms; if(next_point_time<4) { GcLogInfo(m_log_id, FUNCTION, "<CopleyStartPVT>Motion start time:%s. First couch time:%s.First couch to L1 time:%s.", boost::posix_time::to_simple_string(time).c_str(), boost::posix_time::to_simple_string(couch_time).c_str(), boost::posix_time::to_simple_string(couch_to_L1_time).c_str()); GcLogInfo(m_log_id, FUNCTION, "next_point_time: %d.",next_point_time); BOOST_THROW_EXCEPTION(AxisException() <<Axis_Error_Msg("Start PVT time failed! No enough time for First PVT data!")); } AmpPVTData dummy_data = {next_point_time,0,0}; //Send the left dummy data. dummy_data.time = next_point_time; Gantry::Array seg_cmd = ComposePVTRawData(dummy_data,m_next_pvt_index,1); GcLogDebugExpect(m_need_trace, m_log_id, FUNCTION, "<CopleyStartPVT>The %dth PVT dummy data.", m_next_pvt_index); WriteSDO(Gantry::ODAddress(COPLEY_PVT_DATA, 0), (unsigned long long)seg_cmd.GetValue<unsigned long long>()); GcLogInfo(m_log_id, FUNCTION, "<CopleyStartPVT>Motion start time:%s. First couch time:%s.First couch to L1 time:%s.", boost::posix_time::to_simple_string(time).c_str(), boost::posix_time::to_simple_string(couch_time).c_str(), boost::posix_time::to_simple_string(couch_to_L1_time).c_str()); m_total_motion_time_ms += dummy_data.time; m_lasttrj_segments.push_back(seg_cmd.GetValue<unsigned long long>()); ++m_next_pvt_index; GcLogInfo(m_log_id, FUNCTION, "<CopleyStartPVT>Motion Started. Start position %f mm.", pvt_point.p); }

4. 获取当前时间和计算时间差：通过 microsec_clock::universal_time() 获取当前时间，然后使用 Integer2PosixTime<unsigned long long> 将 pvt_point.t 和 pvt_point.timeReachToBuffer 转换为时间戳，并与...

#include <iostream> using namespace std; double area(double length, double width) { return length * width; } double area(double base, double height, double dummy) { return 0.5 * base * height; } double area(double side) { return side * side; } double area(double radius, int dummy) { return 3.14159 * radius * radius; } int main() { double length =3; double width =4; double base =5; double height =7; double side =8; double radius =8; cout << "长方形面积为：" << area(length, width) << endl; cout << "三角形面积为：" << area(base, height, 0) << endl; cout << "正方形面积为：" << area(side) << endl; cout << "圆形面积为：" << area(radius, 0) << endl; return 0; }

#include <math.h> using namespace std; // 长方形面积计算函数 double area(double length, double width) { return length * width; } // 三角形面积计算函数 double area(double base, double height) { ...

dummy.h: No such file or directory

这个错误提示意味着编译器无法找到名为"dummy.h"的头文件。可能是头文件没有包含在编译器的搜索路径中，或者文件名拼写错误，或者文件确实不存在。你需要检查你的代码中是否存在这个头文件，并确保它可以被找到。...

SDK_LIBS = libispalgo.a libmi_hdmi.a libcus3a.a libmi_scl.a libmi_ao.a libmi_rgn.a libmi_sensor.a libmi_dsp.a libmi_vif.a libmi_pcie.a libmi_common.a libcam_os_wrapper.a libmi_dummy.a libcam_fs_wrapper.a libmi_jpd.a libmi_ipu.a libmi_panel.a libmi_ldc.a libmi_vdisp.a libmi_fb.a libmi_vdec.a libmi_sys.a libmi_ai.a libmi_isp.a libmi_gfx.a libmi_shadow.a libmi_venc.a libmi_disp.a libmi_sed.a libmi_iqserver.a libmi_vdf.a makefile如何将SDK_LIBS的.a文件替换为-l格式，比如 libispalgo.a替换为-lispalgo

SDK_LIBS = libispalgo.a libmi_hdmi.a libcus3a.a libmi_scl.a libmi_ao.a libmi_rgn.a libmi_sensor.a libmi_dsp.a libmi_vif.a libmi_pcie.a libmi_common.a libcam_os_wrapper.a libmi_dummy.a libcam_fs_...

Build failed -> task in 'ns3-aqua-sim-ng' failed (exit status 1): {task 140272605382992: cxx aqua-sim-routing-dummy.cc -> aqua-sim-routing-dummy.cc.1.o} ['/usr/bin/g++', '-O0', '-ggdb', '-g3', '-Wall', '-Werror', '-std=c++11', '-Wno-error=deprecated-declarations', '-fstrict-aliasing', '-Wstrict-aliasing', '-fPIC', '-pthread', '-I.', '-I..', '-DNS3_BUILD_PROFILE_DEBUG', '-DNS3_ASSERT_ENABLE', '-DNS3_LOG_ENABLE', '-DHAVE_SYS_IOCTL_H=1', '-DHAVE_IF_NETS_H=1', '-DHAVE_NET_ETHERNET_H=1', '-DHAVE_PACKET_H=1', '-DHAVE_IF_TUN_H=1', '-DHAVE_GSL=1', '-DHAVE_SQLITE3=1', '../src/aqua-sim-ng/model/aqua-sim-routing-dummy.cc', '-c', '-o', '/home/fjl/ns-allinone-3.26/ns-3.26/build/src/aqua-sim-ng/model/aqua-sim-routing-dummy.cc.1.o']

这个错误通常表示在编译aqua-sim-routing-dummy.cc文件时出现了问题。根据日志，这是通过使用g++编译器尝试编译该文件的命令： shell /usr/bin/g++ -O0 -ggdb -g3 -Wall -Werror -std=c++11 -Wno-error=...

dummy_col = df_dummy.loc[:,df_dummy.dtypes == 'uint8'].columns

这行代码的作用是筛选出 DataFrame df_dummy 中所有值类型为 uint8 的列，并将这些列的列名存储在 dummy_col 变量中。在 Pandas 中，df.dtypes 可以返回 DataFrame 中所有列的数据类型，然后我们可以使用...

#include "tst_test.h" #include "tst_safe_macros.h" #include "lapi/sched.h" #define MAX_TRIES 1000 static void child_func(void) { int fd, len, event_found, tries; struct sockaddr_nl sa; char buffer[4096]; struct nlmsghdr nlh; / child will listen to a network interface create/delete/up/down events / memset(&sa, 0, sizeof(sa)); sa.nl_family = AF_NETLINK; sa.nl_groups = RTMGRP_LINK; fd = SAFE_SOCKET(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); SAFE_BIND(fd, (struct sockaddr ) &sa, sizeof(sa)); /* waits for parent to create an interface / TST_CHECKPOINT_WAKE_AND_WAIT(0); / * To get rid of "resource temporarily unavailable" errors * when testing with -i option / tries = 0; event_found = 0; nlh = (struct nlmsghdr ) buffer; while (tries < MAX_TRIES) { len = recv(fd, nlh, sizeof(buffer), MSG_DONTWAIT); if (len > 0) { /* stop receiving only on interface create/delete event / if (nlh->nlmsg_type == RTM_NEWLINK || nlh->nlmsg_type == RTM_DELLINK) { event_found++; break; } } usleep(10000); tries++; } SAFE_CLOSE(fd); if (event_found) tst_res(TPASS, "interface changes detected"); else tst_res(TFAIL, "failed to detect interface changes"); exit(0); } static void test_netns_netlink(void) { / unshares the network namespace / SAFE_UNSHARE(CLONE_NEWNET); if (SAFE_FORK() == 0) child_func(); / wait until child opens netlink socket / TST_CHECKPOINT_WAIT(0); / creates TAP network interface dummy0 / if (WEXITSTATUS(system("ip tuntap add dev dummy0 mode tap"))) tst_brk(TBROK, "adding interface failed"); / removes previously created dummy0 device / if (WEXITSTATUS(system("ip tuntap del mode tap dummy0"))) tst_brk(TBROK, "removing interface failed"); / allow child to continue / TST_CHECKPOINT_WAKE(0); tst_reap_children(); } static struct tst_test test = { .test_all = test_netns_netlink, .needs_checkpoints = 1, .needs_root = 1, .forks_child = 1, .needs_kconfigs = (const char []) { "CONFIG_NET_NS=y", "CONFIG_TUN", NULL }, };

然后使用系统命令创建一个TAP网络接口（dummy0），并使用系统命令删除之前创建的dummy0设备。最后使用tst_checkpoint_wake函数允许子进程继续执行。最后定义了一个tst_test结构体，指定了测试运行的函数为...

补全以下代码typedef enum{frame_arrival}event_type; #include "protocol.h" void sender2(void) { frame s; /buffer for an outbound frame/ packet buffer; /buffer for an outbound packet/ event_type event; /frame_arrival is the only possibility/ while(true){ from_network_layer(&buffer);/go get something to send/ s.info = buffer; /copy it into s for transmission/ to_physical_layer(&s); /bye-bye little frame/ wait_for_event(&event); /do not proceed until given the go ahead/ } } void receiver2(void) { frame r,s; /buffers for frames/ event_type event; /frame_arrival is the only possibility/ while(true) { wait_for_event(&event); /only possibility is frame_arrival/ from_physical_layer(&r); /go get the inbound frame/ to_network_layer(&r.info); /pass the data to the network layer/ to_physical_layer(&s); /send a dummy frame to awaken sender/ } }

接收方的函数名为receiver2()，其主要功能是接收帧，将帧中的数据传递给网络层，然后发送一个dummy帧给发送方，以唤醒发送方并继续发送数据。具体实现步骤如下： 1. 调用wait_for_event()函数，等待接收到“帧到达...

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dummy_col = df_dummy.loc[:,df_dummy.dtypes == 'uint8'].columns

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