public class s {
static int x,xx,y,yystatic double sum=0
public static void main(String[] args)
{
String answer="y"double h=0
Scanner input=new Scanner(System.in)
System.out.println("请输入客户数：")
int m=input.nextInt()
int n=m*3
tostring()
do
{
order()
h+=(s(x,xx))+(d(y,yy))
System.out.println("是否继续：")
answer=input.next()
if(answer.equals("n"))
break
}while(true)
System.out.println(h+n)
}
static void tostring()
{
System.out.println("菜单")
System.out.println("食品：")
System.out.println("1咖喱牛肉饭￥40.00")
System.out.println("2寿司套餐￥65.00")
System.out.println("3扬州市消防3米￥45.00")
System.out.println("4沙朗牛排和意大利面￥72.00")
System.out.println("5鸡肉蔬菜卷￥42.00")
System.out.println("饮料：")
System.out.println("21软饮料￥10.00")
System.out.println("22红葡萄酒￥15.00")
System.out.println("23啤酒￥15.00")
}
static double s(int f,int x)
{
double p=0
switch(f)
{
case 1:p=40.00break
case 2:p=65.00break
case 3:p=45.00break
case 4:p=72.00break
case 5:p=42.00break
}
sum=p*x
return sum
}
static double d(int f,int x)
{
double p=0
switch(f)
{
case 21:p=10.00break
case 22:p=15.00break
case 23:p=15.00break
}
sum=p*x
return sum
}
static void order()
{
Scanner input=new Scanner(System.in)
System.out.println("请选择食品：")
x=input.nextInt()
System.out.println("请选择份数：")
xx=input.nextInt()
System.out.println("请选择饮料：")
y=input.nextInt()
System.out.println("请选择瓶数：")
yy=input.nextInt()
}
}
加分！！！！！
简单的点菜系统，可供学习：#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#define SERVPORT 3333
#define MAXDATASIZE 100 /*每次最大数据传输量 */
int main(int argc, char *argv[])
{
int sockfd, recvbytes
char buf[MAXDATASIZE]
struct hostent *host
struct sockaddr_in serv_addr
if (argc <2)
{ fprintf(stderr,"Please enter the server's hostname!\
")exit(1) }
if ((host=gethostbyname(argv[1]))==NULL)
{ perror("gethostbyname出错！")exit(1)}
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{ perror("socket创建出错！")exit(1) }
//初始化客户端
serv_addr.sin_family=AF_INET
serv_addr.sin_port=htons(SERVPORT)
serv_addr.sin_addr = *((struct in_addr *)host->h_addr)
bzero(&(serv_addr.sin_zero),8)
//connect
if (connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(struct sockaddr)) == -1)
{ perror("connect error！")exit(1)}
//recv
if ((recvbytes=recv(sockfd, buf, MAXDATASIZE, 0)) ==-1)
{ perror("recv出错！")exit(1)}
buf[recvbytes] = '\\0'
printf("Received: %s",buf)
close(sockfd)
return 0
}
客户端#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/wait.h>
#define SERVPORT 3333 /*服务器监听端口号 */
#define BACKLOG 10 /* 最大同时连接请求数 */
int main()
{
int sockfd,client_fd,sin_size/*sock_fd：监听socket；client_fd：数据传输socket */
struct sockaddr_in my_addr/* 本机地址信息 */
struct sockaddr_in remote_addr/* 客户端地址信息 */
//创建一个套接字，PF_INET，流式，
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{ perror("socket")exit(1) }
//初始化服务端
my_addr.sin_family=AF_INET
my_addr.sin_port=htons(SERVPORT)
my_addr.sin_addr.s_addr = INADDR_ANY
bzero(&(my_addr.sin_zero),8)
//将套接字地址与所创建的套接字号联系起来
if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)) == -1)
{ perror("bind") exit(1) }
//愿意接收连接
if (listen(sockfd, BACKLOG) == -1)
{ perror("listen") exit(1) }
while(1)
{
sin_size = sizeof(struct sockaddr_in)
if ((client_fd = accept(sockfd, (struct sockaddr *)&remote_addr, &sin_size)) == -1)
{ perror("accept") continue}
printf("received a connection from %s\
", inet_ntoa(remote_addr.sin_addr))
if (!fork()) { /* 子进程代码段 */
if (send(client_fd, "Hello, you are connected!\
", 26, 0) == -1)
perror("send")close(client_fd)exit(0)}
close(client_fd) }
return 0
}
