为了账号安全，请及时绑定邮箱和手机立即绑定

作业社区

探索学习新天地，共享知识资源！

0份 提交作业
0个 布置作业
0份 满分作业
得分 100
学习任务

SamstagBaron 的学生作业：

【图片】

来源：物联网/嵌入式全能工程师（提薪优选） · tcp 协议与wireshark抓包分析 - 课后任务
得分 100
学习任务

SamstagBaron 的学生作业：

【图片】

来源：物联网/嵌入式全能工程师（提薪优选） · udp 协议与wireshark抓包分析 - 课后任务
得分 100
讨论题

Felixxx 的学生作业：

【图片】

+28
来源：物联网/嵌入式全能工程师（提薪优选） · 多文件编程-课后练习
得分 100
学习任务

guzimou 的学生作业：

#include void output(unsigned char *p, int n) { for (int i = 0; i < n; i++) { printf("%c ", p[i]); } printf("\n"); } void select_sort(unsigned char *p, int n) { int i, j, k, t = 0; for (i = 0; i < n - 1; i++) { k = i; for (j = k + 1; j < n-1; j++) { if (p[j] < p[k]) { k = j; } } if (k != i) { p[i] ^= p[k]; p[k] ^= p[i]; p[i] ^= p[k]; } } return; } int main(int argc, char const *argv[]) { unsigned char str[] = "decba"; int n = sizeof(str) / sizeof(str[0]); output(str, n); select_sort(str, n); output(str, n); return 0; } 结果： linux@linux:~/class/week07/select$ ./a.out d e c b a a b c d e

+109
来源：物联网/嵌入式工程师 · 简单选择排序
得分 100
讨论题

火烛明 的学生作业：

printf(“a + b > 0\n”);

+34
来源：物联网/嵌入式全能工程师（提薪优选） · 课后练习-思考下列代码运行的结果
得分 100
学习任务

guzimou 的学生作业：

#include void output(unsigned char *p, int n) { for (int i = 0; i < n; i++) { printf("%c ", p[i]); } printf("\n"); } void select_sort(unsigned char *p, int n) { for (int i = 0; i < n - 1; i++) { for (int j = 0; j < n - 2 - i; j++) { if (p[j] > p[j + 1]) { int temp = p[j]; p[j] = p[j + 1]; p[j + 1] = temp; } } } return; } int main(int argc, char const *argv[]) { unsigned char str[] = "decba"; int n = sizeof(str) / sizeof(str[0]); output(str, n); select_sort(str, n); output(str, n); return 0; }

+113
来源：物联网/嵌入式工程师 · 冒泡排序-学习任务
得分 100
讨论题

火烛明 的学生作业：

一、 原码：1001 1110 反码：1110 0001 补码：1110 0010 二、 1100 1101

+38
来源：物联网/嵌入式全能工程师（提薪优选） · 【讨论题】原码、反码、补码的存储-课后任务
得分 100
学习任务

SamstagBaron 的学生作业：

client #include"tcptool.h" #include"debug.h" #include #include"file_handle.h" #include"stdlib.h" int main(int argc,char *argv[]){ if(argc!=4){ fprintf(stderr,"usage: < %s IP PORT FilePath >\n",argv[0]); } int sockfd; sockfd = connectToServer(argv[1],atoi(argv[2])); if(sockfd==-1){ DEBUG_INFO("create Tcp server Error"); } UpLoadFileFromClient(sockfd,argv[3]); close(sockfd); return 0; } server #include"tcptool.h" #include"debug.h" #include #include"stdlib.h" #include #include"file_handle.h" void* thread_handle(void*arg){ int cfd = *(int*)arg; RecvFileFromClient(cfd); close(cfd); pthread_exit(NULL); } int main(int argc,char *argv[]){ if(argc!=3){ fprintf(stderr,"usage: \n",argv[0]); } int sockfd,sockcfd; pthread_t tid; int res = 0; sockfd = createTcpServer(argv[1],atoi(argv[2])); if(sockfd==-1){ DEBUG_INFO("create Tcp server Error"); } struct sockaddr_in addr; while(1){ bzero(&addr,sizeof(addr)); sockcfd = listenToClient(sockfd,&addr); if(sockcfd==-1){ exit(EXIT_FAILURE); } show_accepted_client(&addr); res = pthread_create(&tid,NULL,thread_handle,&sockcfd); if(res!=0){ DEBUG_INFO("[ERROR] : %s ",strerror(res)); exit(EXIT_FAILURE); } pthread_detach(tid); } close(sockfd); return 0; } 【图片】【图片】【图片】

来源：物联网/嵌入式全能工程师（提薪优选） · 文件传输模块设计(六)-客户端与服务器测试-课后任务
得分 100
学习任务

Felixxx 的学生作业：

一、条件编译 #if 宏名 C语言1; #else C语言2; #endif 功能： 判断宏名是否为真,为真编译C语言代码1，否则编译C语言代码2 二、宏是否定义判断 #ifndef 宏名 C语言1; #else C语言2； #endif 功能：若没有定义，则会指定C语言1，否则执行C语言2

+28
来源：物联网/嵌入式全能工程师（提薪优选） · 条件编译-课后任务
得分 100
讨论题

Felixxx 的学生作业：

#include #define MAX_VALUE(x,y) x>y?x:y int main() { int a=10,b=20; int max; max = MAX_VALUE(a,b); printf("%d",max); return(0); }

+30
来源：物联网/嵌入式全能工程师（提薪优选） · C语言宏定义的使用-课后练习
得分 100
讨论题

Felixxx 的学生作业：

#include int digui(int n) { if(n == 0) return 1; else return n * digui (n-1); } int main() { int n = 5; int sum = digui(n); printf("%d",sum); return(0); }

+29
来源：物联网/嵌入式全能工程师（提薪优选） · 递归函数-课后练习
得分 100
讨论题

Felixxx 的学生作业：

#include int find_max(const int x,const int y) { if(x>y) return x; else return y; } int find_min(const int x,const int y) { if(x>y) return y; else return x; } int get_result(const int x,const int y,int (*pfun)(int,int)) { int result; result = pfun(x,y); return result; } int main() { int x,y; scanf("%d,%d",&x,&y); int max; max = get_result(x,y,find_max); int min; min = get_result(x,y,find_min); printf("%d,%d",max,min); return(0); }

+29
来源：物联网/嵌入式全能工程师（提薪优选） · 函数指针-课后任务
得分 100
学习任务

SamstagBaron 的学生作业：

#include"file_handle.h" #include"debug.h" #include #include int recv_protocol_head(int cfd,file_protocol_t* head){ ssize_t res; ssize_t received = 0; char*buffer = (char*)head; while(1){ res = recvTcp(cfd,buffer+received,sizeof(file_protocol_t)-received); if(res==-1){ DEBUF_INFO("[ERROR]: Received Failed"); return -1; } else if(res==0){ DEBUF_INFO("[ERROR]: Client poweroff, Received Failed"); return -1; }else{ received+=res; } if(received==sizeof(file_protocol_t)){ break; } } return 0; } int getFile(int cfd,const char*filename,size_t filesize){ char buffer[100]={0}; int fd = open(filename,O_WRONLY|O_CREAT|O_TRUNC,0644); if(fd==-1){ DEBUF_INFO("[ERROR]: Open File %s %s",filename,strerror(errno)); return -1; } ssize_t rbytes = 0,wbytes = 0,received = 0; while(1){ rbytes = recvTcp(cfd,buffer,100); if(rbytes==-1){ DEBUF_INFO("[ERROR]: Received Failed"); close(fd); return -1; } else if(rbytes==0){ DEBUF_INFO("[ERROR]: Client poweroff, Received Failed"); close(fd); return -1; }else{ received+=rbytes; wbytes = write(fd,buffer,rbytes); if(wbytes!=rbytes){ DEBUF_INFO("[ERROR]: Write File %s %s",filename,strerror(errno)); close(fd); return -1; } } if(received==filesize){ close(fd); return 0; } } return 0; } int RecvFileFromClient(int cfd){ file_protocol_t head; int res = recv_protocol_head(cfd,&head); int received = getFile(cfd,head.filename,head.file_size); return received; } int send_protocol_head(const char* filename,int sockfd){ file_protocol_t head; strcpy(head.filename,filename); int fd = open(filename,O_RDONLY); if(fd==-1){ DEBUF_INFO("[ERROR]: Open File %s %s",filename,strerror(errno)); return -1; } head.file_size = lseek(fd,0,SEEK_END); close(fd); int res = sendTcp(sockfd,(const void* )&head,sizeof(head)); return res==sizeof(head)?0:-1; } int UpLoadFileFromClient(int cfd,const char *filename){ int res = send_protocol_head(filename,cfd); if(res==-1){ return -1; } char buffer[1024] = {0}; int fd = open(filename,O_RDONLY); if(fd==-1){ DEBUF_INFO("[ERROR]: Open File %s %s",filename,strerror(errno)); return -1; } ssize_t rbytes = 0,sbytes = 0; while(1){ rbytes = read(fd,buffer,sizeof(buffer)); if(rbytes==0){ break; }else if(rbytes

来源：物联网/嵌入式全能工程师（提薪优选） · 文件传输模块设计(五)-文件上传发送-课后任务
得分 100
学习任务

SamstagBaron 的学生作业：

#include"file_handle.h" #include"debug.h" #include #include int recv_protocol_head(int cfd,file_protocol_t* head){ ssize_t res; ssize_t received = 0; char*buffer = (char*)head; while(1){ res = recvTcp(cfd,buffer+received,sizeof(file_protocol_t)-received); if(res==-1){ DEBUF_INFO("[ERROR]: Received Failed"); return -1; } else if(res==0){ DEBUF_INFO("[ERROR]: Client poweroff, Received Failed"); return -1; }else{ received+=res; } if(received==sizeof(file_protocol_t)){ break; } } return 0; } int getFile(int cfd,const char*filename,size_t filesize){ char buffer[100]={0}; int fd = open(filename,O_WRONLY|O_CREAT|O_TRUNC,0644); if(fd==-1){ DEBUF_INFO("[ERROR]: Open File %s %s",filename,strerror(errno)); return -1; } ssize_t rbytes = 0,wbytes = 0,received = 0; while(1){ rbytes = recvTcp(cfd,buffer,100); if(rbytes==-1){ DEBUF_INFO("[ERROR]: Received Failed"); close(fd); return -1; } else if(rbytes==0){ DEBUF_INFO("[ERROR]: Client poweroff, Received Failed"); close(fd); return -1; }else{ received+=rbytes; wbytes = write(fd,buffer,rbytes); if(wbytes==-1){ DEBUF_INFO("[ERROR]: Write File %s %s",filename,strerror(errno)); close(fd); return -1; } } if(received==filesize){ close(fd); return 0; } } return 0; } int RecvFileFromClient(int cfd){ file_protocol_t head; int res = recv_protocol_head(cfd,&head); int received = getFile(cfd,head.filename,head.file_size); return received; } int send_protocol_head(const char* filename,int sockfd){ file_protocol_t head; strcpy(head.filename,filename); int fd = open(filename,O_RDONLY); if(fd==-1){ DEBUF_INFO("[ERROR]: Open File %s %s",filename,strerror(errno)); return -1; } head.file_size = lseek(fd,0,SEEK_END); close(fd); int res = sendTcp(sockfd,(const void* )&head,sizeof(head)); return res==sizeof(head)?0:-1; }

来源：物联网/嵌入式全能工程师（提薪优选） · 文件传输模块设计(四)-协议头发送接口设计-课后任务
得分 100
学习任务

SamstagBaron 的学生作业：

#include"file_handle.h" #include"debug.h" #include #include int recv_protocol_head(int cfd,file_protocol_t* head){ ssize_t res; ssize_t received = 0; char*buffer = (char*)head; while(1){ res = recvTcp(cfd,buffer+received,sizeof(file_protocol_t)-received); if(res==-1){ DEBUF_INFO("[ERROR]: Received Failed"); return -1; } else if(res==0){ DEBUF_INFO("[ERROR]: Client poweroff, Received Failed"); return -1; }else{ received+=res; } if(received==sizeof(file_protocol_t)){ break; } } return 0; } int getFile(int cfd,const char*filename,size_t filesize){ char buffer[100]={0}; int fd = open(filename,O_WRONLY|O_CREAT|O_TRUNC,0644); if(fd==-1){ DEBUF_INFO("[ERROR]: Open File %s %s",filename,strerror(errno)); } ssize_t rbytes = 0,wbytes = 0,received = 0; while(1){ rbytes = recvTcp(cfd,buffer,100); if(rbytes==-1){ DEBUF_INFO("[ERROR]: Received Failed"); close(fd); return -1; } else if(rbytes==0){ DEBUF_INFO("[ERROR]: Client poweroff, Received Failed"); close(fd); return -1; }else{ received+=rbytes; wbytes = write(fd,buffer,rbytes); if(wbytes==-1){ DEBUF_INFO("[ERROR]: Write File %s %s",filename,strerror(errno)); close(fd); return -1; } } if(received==filesize){ close(fd); return 0; } } return 0; } int RecvFileFromClient(int cfd){ file_protocol_t head; int res = recv_protocol_head(cfd,&head); int received = getFile(cfd,head.filename,head.file_size); return received; }

来源：物联网/嵌入式全能工程师（提薪优选） · 文件传输模块设计(三)-服务器文件上传接收-课后任务
得分 100
学习任务

SamstagBaron 的学生作业：

#include"file_handle.h" #include"debug.h" #include #include int recv_protocol_head(int cfd,file_protocol_t* head){ ssize_t res; ssize_t received = 0; char*buffer = (char*)head; while(1){ res = recvTcp(cfd,buffer+received,sizeof(file_protocol_t)-received); if(res==-1){ DEBUF_INFO("[ERROR]: Received Failed"); return -1; } else if(res==0){ DEBUF_INFO("[ERROR]: Client poweroff, Received Failed"); return -1; }else{ received+=res; } if(received==sizeof(file_protocol_t)){ break; } } return 0; } int getFile(int cfd,const char*filename,size_t filesize){ char buffer[100]={0}; int fd = open(filename,O_WRONLY|O_CREAT|O_TRUNC,0644); if(fd==-1){ DEBUF_INFO("[ERROR]: Open File %s %s",filename,strerror(errno)); } ssize_t rbytes = 0,wbytes = 0,received = 0; while(1){ rbytes = recvTcp(cfd,buffer,100); if(rbytes==-1){ DEBUF_INFO("[ERROR]: Received Failed"); close(fd); return -1; } else if(rbytes==0){ DEBUF_INFO("[ERROR]: Client poweroff, Received Failed"); close(fd); return -1; }else{ received+=rbytes; wbytes = write(fd,buffer,rbytes); if(wbytes==-1){ DEBUF_INFO("[ERROR]: Write File %s %s",filename,strerror(errno)); close(fd); return -1; } } if(received==filesize){ close(fd); return 0; } } return 0; }

来源：物联网/嵌入式全能工程师（提薪优选） · 文件传输模块设计(二)- 接收数据-课后任务
得分 100
学习任务

SamstagBaron 的学生作业：

#ifndef __FILE_HANDLE_H__ #define __FILE_HANDLE_H__ #define FILENAME_SZ 256 #include"tcptool.h" typedef struct { size_t file_size; char filename[FILENAME_SZ]; }file_protocol_t; extern int recv_protocol_head(int cfd,file_protocol_t* head); #endif #include"file_handle.h" #include"debug.h" int recv_protocol_head(int cfd,file_protocol_t* head){ ssize_t res; ssize_t received = 0; char*buffer = (char*)head; while(1){ res = recvTcp(cfd,buffer+received,sizeof(file_protocol_t)-received); if(res==-1){ DEBUF_INFO("[ERROR]: Received Failed"); return -1; } else if(res==0){ DEBUF_INFO("[ERROR]: Client poweroff, Received Failed"); return -1; }else{ received+=res; } if(received==sizeof(file_protocol_t)){ break; } } return 0; }

来源：物联网/嵌入式全能工程师（提薪优选） · 文件传输模块设计(一)- 协议设计与接收协议头-课后练习
得分 100
学习任务

ExtraOrdinary 的学生作业：

sum= 15

+216
来源：物联网/嵌入式工程师 · 自己把下列代码写出来，用GCC编译器运行，运行查看结果。
得分 100
学习任务

zw.s 的学生作业：

【图片】

+13
来源：物联网/嵌入式全能工程师（提薪优选） · 标准io介绍_fprintf_缓冲区 - 课后任务
得分 100
学习任务

SamstagBaron 的学生作业：

tcp c file #include #include #include #include"tcptool.h" const int BLOCKSOCK = 100; int createTcpServer(const char* ip,short port){ int sockfd; ssize_t rbytes = 0,sbytes = 0; char buffer[1024] = {0}; sockfd = socket(AF_INET,SOCK_STREAM,0); if(sockfd==-1){ perror("error for socket"); return -1; } struct sockaddr_in addr; bzero(&addr,sizeof(addr)); addr.sin_family = AF_INET; addr.sin_port = htons(port); addr.sin_addr.s_addr = inet_addr(ip); int res = bind(sockfd,(const struct sockaddr*)&addr,sizeof(addr)); if(res==-1){ perror("error for bind"); return -1; } res = listen(sockfd,BLOCKSOCK); if(res==-1){ perror("error for listen"); return -1; } return sockfd; } int connectToServer(const char* ip,short port){ int sockfd; sockfd = socket(AF_INET,SOCK_STREAM,0); if(sockfd==-1){ perror("error for socket"); return -1; } struct sockaddr_in addr; bzero(&addr,sizeof(addr)); addr.sin_family = AF_INET; addr.sin_port = htons(port); addr.sin_addr.s_addr = inet_addr(ip); int res = connect(sockfd,(const struct sockaddr*)&addr,sizeof(addr)); if(res==-1){ perror("error for connet"); return -1; } return sockfd; } int listenToClient(int sockfd, struct sockaddr_in* addr){ int cfd; socklen_t len = sizeof(struct sockaddr); cfd = accept(sockfd,(struct sockaddr*) addr,&len); if(cfd==-1){ perror("error for accept"); return -1; } return cfd; } void show_accepted_client(struct sockaddr_in* addr){ printf("Ip: %s \n",inet_ntoa(addr->sin_addr)); printf("Port: %d \n",ntohs(addr->sin_port)); } ssize_t sendTcp(int sockfd,const void *buf,size_t len){ return send(sockfd,buf,len,0); } ssize_t recvTcp(int sockfd, void *buf,size_t len ){ return recv(sockfd,buf,len,0); } tcp makefile .PHONY: all clean SRC=$(wildcard *.c) OBJ=$(patsubst %.c,%.o,$(SRC)) all:$(OBJ) $(OBJ):%.o:%.c @$(CC) $(C_FLAG) $(INCLUDE_DIR) -c $^ -o $(OBJ_DIR)/$@ server file #include"tcptool.h" #include"debug.h" #include #include"stdlib.h" int main(int argc,char *argv[]){ if(argc!=3){ fprintf(stderr,"usage: \n",argv[0]); } int sockfd,sockcfd; sockfd = createTcpServer(argv[1],atoi(argv[2])); if(sockfd==-1){ DEBUF_INFO("create Tcp server Error"); } struct sockaddr_in addr; bzero(&addr,sizeof(addr)); sockcfd = listenToClient(sockfd,&addr); if(sockcfd==-1){ exit(EXIT_FAILURE); } show_accepted_client(&addr); close(sockcfd); close(sockfd); return 0; } server makefile .PHONY: all clean SRC=$(wildcard *.c) OBJ=$(patsubst %.c,%.o,$(SRC)) all:$(OBJ) server $(OBJ):%.o:%.c @$(CC) $(C_FLAG) $(INCLUDE_DIR) -c $^ -o $@ server:$(wildcard $(OBJ_DIR)/*.o) $(OBJ) @$(CC) $(C_FLAG) $(INCLUDE_DIR) $^ -o $(BIN_DIR)/$(SERVER) clean: @rm *.o client file #include"tcptool.h" #include"debug.h" #include #include"stdlib.h" int main(int argc,char *argv[]){ if(argc!=3){ fprintf(stderr,"usage: \n",argv[0]); } int sockfd; sockfd = connectToServer(argv[1],atoi(argv[2])); if(sockfd==-1){ DEBUF_INFO("create Tcp server Error"); } struct sockaddr_in addr; bzero(&addr,sizeof(addr)); close(sockfd); return 0; } client makefile .PHONY: all clean SRC=$(wildcard *.c) OBJ=$(patsubst %.c,%.o,$(SRC)) all:$(OBJ) server $(OBJ):%.o:%.c @$(CC) $(C_FLAG) $(INCLUDE_DIR) -c $^ -o $@ server:$(wildcard $(OBJ_DIR)/*.o) $(OBJ) @$(CC) $(C_FLAG) $(INCLUDE_DIR) $^ -o $(BIN_DIR)/$(CLIENT) clean: rm *.o

来源：物联网/嵌入式全能工程师（提薪优选） · tcp socket 封装（四) - 客户端与服务器测试-课后练习
首页上一页90919293949596下一页尾页
查看课程
查看课程
查看课程
微信客服

购课补贴
联系客服咨询优惠详情

 帮助反馈 APP下载

慕课网APP
您的移动学习伙伴

 公众号

扫描二维码
关注慕课网微信公众号