C语言实现-航空订票系统（飞机订票系统）[通俗易懂]

 1 #include <stdio.h>  2 #include <stdlib.h>  3 #include <string.h>  4 #include <stdbool.h>  5 //#include "getch.h"  6 #include <conio.h>  7 #define MAX_Flight 50  8 #define MAX_Passenger 20  9 #define MAX_Order 50  10  11 typedef struct Flight  12 {  13 char fid[20]; //航班号  14 char fname[20]; //航班名称  15 char start[10]; //起点  16 char end[10]; //终点  17 int fnum; //票数  18 }Flight;  19  20 typedef struct Passenger  21 {  22 char pid[20]; //身份证  23 char pname[10]; //姓名  24 char password[20]; //密码  25 char tell[20]; //电话  26 }Passenger;  27  28 typedef struct Order  29 {  30 char pid[20]; //身份证  31 char fid[20]; //航班号  32 int num; //票数  33 }Order;  34  35 Flight *FLI;  36 Passenger *PAS;  37 Order *ORD;  38  39 char start[10]; //起点  40 char end[10]; //终点  41 char search_fid[50][20]; //符合条件的航班号  42 int search_fnum[50]; //符合条件的航班票数  43 int online = 0; //是否登录的变量  44 char online_pid[20]; //在线用户的身份证  45 int search_num = 0; //符合条件的航班数  46  47 void init_sys(void); // 系统初始化  48 void show_flight(void); // 显示航班表  49 void start_sys(void); // 系统开始运行  50 void exit_sys(void); // 退出系统  51 void menu(void); // 生成主菜单  52 void login(void); // 登录  53 void logout(void); //用户登出  54 void passenger_info(void); //查询旅客信息  55 bool change_pas_info(void); //修改旅客信息  56 void search_start(void); // 生成查询页面  57 bool search(void); // 查询航班  58 void order_list(void); // 生成订单表  59 void del_order(void); // 退票  60 void clear_stdin(void); // 清除输入缓冲区  61 char* get_str(char* str,size_t len); // 获取字符串  62 char get_cmd(char start,char end); // 获取cmd命令  63  64 int main()  65 {  66  init_sys();  67  start_sys();  68  exit_sys();  69 return 0;  70 }  71  72 // 系统初始化  73 void init_sys(void)  74 {  75 // 申请堆内存、加载数据  76 FLI = calloc(MAX_Flight,sizeof(Flight));  77 PAS = calloc(MAX_Passenger,sizeof(Passenger));  78 ORD = calloc(MAX_Order,sizeof(Order));  79 printf("system_init...\n");  80  81 FILE* ofrp = fopen("order.txt","r");  82 int i=0;  83 for(i=0; i<MAX_Order; i++) //读取文本中的数据到内存  84 { int num = 0;  85 num = fscanf(ofrp,"%s %s %d\n",ORD[i].pid,ORD[i].fid,&ORD[i].num);  86  }  87  88 FILE* ffrp = fopen("flight.txt","r");  89 for(i=0; i<MAX_Flight; i++)  90  {  91 int num = 0;  92 num = fscanf(ffrp,"%s %s %s %s %d\n",FLI[i].fid,FLI[i].fname,FLI[i].start,FLI[i].end,&FLI[i].fnum);  93  }  94  95 FILE* pfrp = fopen("passenger.txt","r");  96 for(i=0; i<MAX_Passenger; i++)  97  {  98 int num = 0;  99 num = fscanf(pfrp,"%s %s %s %s\n",PAS[i].pid,PAS[i].pname,PAS[i].password,PAS[i].tell); 100  } 101 } 102 103 // 显示航班表 104 void show_flight(void) 105 { 106 int i = 0; 107 for(i=0; i<MAX_Flight; i++) 108  { 109 if(strlen(FLI[i].fid) != 0) 110  { 111 printf("id:%s name:%s start:%s end:%s fnum:%d\n",FLI[i].fid,FLI[i].fname,FLI[i].start,FLI[i].end,FLI[i].fnum); 112  } 113  } 114 } 115 116 // 系统开始运行 117 void start_sys(void) 118 { 119 // 进入系统的业务流程控制 120 //printf("系统开始运行...\n"); 121 //show_flight(); 122 while(true) 123  { 124  menu(); 125 switch(get_cmd('0','7')) 126  { 127 case '1': search_start(); break; 128 case '2': order_list(); break; 129 case '3': del_order(); break; 130 case '4': passenger_info(); break; 131 case '5': change_pas_info(); break; 132 case '6': login(); break; 133 case '7': logout(); break; 134 case '0': return; 135  } 136  } 137 } 138 139 // 系统结束 140 void exit_sys(void) 141 { 142 printf("data insert...\n"); 143 FILE* ofwp = fopen("order.txt","w"); 144 printf("ready insert order.txt\n"); 145 int i= 0; 146 for(i=0; i<MAX_Order; i++) //数据存储回本地 147  { 148 int num = 0; 149 if(strlen(ORD[i].pid) != 0) 150  { 151 num = fprintf(ofwp,"%s %s %d\n",ORD[i].pid,ORD[i].fid,ORD[i].num); 152 //printf("insert order.txt success\n"); 153  } 154  } 155 156 FILE* ffwp = fopen("flight.txt","w"); 157 printf("insert flight.txt\n"); 158 for(i=0; i<MAX_Flight; i++) 159  { 160 int num = 0; 161 if(strlen(FLI[i].fid) != 0) 162  { 163 num = fprintf(ffwp,"%s %s %s %s %d\n",FLI[i].fid,FLI[i].fname,FLI[i].start,FLI[i].end,FLI[i].fnum); 164 //printf("insert flight.txt success\n"); 165  } 166  } 167 168 FILE* pfwp = fopen("passenger.txt","w"); 169 printf("insert passenger.txt\n"); 170 for(i=0; i<MAX_Passenger; i++) 171  { 172 int num = 0; 173 if(strlen(PAS[i].pid) != 0) 174  { 175 num = fprintf(pfwp,"%s %s %s %s\n",PAS[i].pid,PAS[i].pname,PAS[i].password,PAS[i].tell); 176 //printf("insert passenger.txt success\n"); 177  } 178  } 179 // 释放内存、保存数据 180 free(FLI); 181 free(PAS); 182 free(ORD); 183 printf("exit...\n"); 184 } 185 186 // 生成主菜单 187 void menu(void) 188 { 189 printf("\n"); 190 printf("********************************\n"); 191 printf("| |\n"); 192 printf("| flight order system |\n"); 193 printf("* 1.search_flight *\n"); //查询航班 194 printf("| 2.order_list |\n"); //查询订票信息 195 printf("* 3.del_order *\n"); //退订 196 printf("| 4.passenger_info |\n"); //查询旅客信息 197 printf("* 5.change_pas_info *\n"); //修改旅客信息 198 printf("| 6.login |\n"); //用户登录 199 printf("* 7.logout *\n"); //用户登出 200 printf("| 0.exit_sys |\n"); //退出系统 201 printf("| |\n"); 202 printf("********************************\n"); 203 //printf("\n"); 204 } 205 206 // 登录 207 void login(void) 208 { 209 if(online == 0) //如果没有登录 210  { 211 int i=0; 212 int time = 0; 213 while(time<3) 214  { 215 char entry_pid[20]; //临时变量身份证 216 char entry_pw[20]; //临时变量密码 217 printf("please login!\n"); 218 printf("please entry pid:"); 219 get_str(entry_pid,20); 220 printf("please entry password:"); 221 get_str(entry_pw,20); 222 for(i=0; i<MAX_Passenger; i++) 223  { 224 if(strlen(entry_pid)==0 || strlen(entry_pw)==0) 225  { 226 printf("pid or password can't be empty\n"); 227 time++; 228 break; 229  } 230 else if(strcmp(PAS[i].pid,entry_pid) == 0 && strcmp(PAS[i].password,entry_pw) == 0) 231  { 232 printf("login success!\n"); 233  strcpy(online_pid,entry_pid); 234 online = 1; 235 return; 236  } 237 else if(i==MAX_Passenger-1) 238  { 239 printf("pid or password error\n"); 240 time++; 241  } 242  } 243  } 244 online = -1; 245 printf("you have been locked,you can use this system now\n"); 246  } 247 else if(online ==1) 248  { 249 printf("you have been login\n"); 250  } 251 else 252  { 253 printf("you have been locked,you can use this system now\n"); 254  } 255 256 } 257 258 // 用户登出 259 void logout(void) 260 { 261 if(online == 1) //如果已经登录 262  { 263 online = 0; 264 printf("logout success\n"); 265  } 266 else if(online == -1) 267  { 268 printf("you have been locked,you can use this system now\n"); 269  } 270 else 271  { 272 printf("you have not login\n"); 273  } 274 } 275 276 // 查询旅客信息 277 void passenger_info(void) 278 { 279 if(online == 1) //如果已经登录 280  { 281 //printf("online_pid:"); 282 //puts(online_pid); 283 int i = 0; 284 for(i=0; i<MAX_Passenger; i++) 285  { 286 if(strcmp(online_pid,PAS[i].pid)==0) 287  { 288 printf("pid:%s, pname:%s, password:%s, tell:%s\n",PAS[i].pid,PAS[i].pname,PAS[i].password,PAS[i].tell); 289 break; 290  } 291  } 292  } 293 else if(online == -1) 294  { 295 printf("you have been locked,you can use this system now\n"); 296  } 297 else 298  { 299 printf("you have not login\n"); 300  } 301 } 302 303 //修改旅客信息 304 bool change_pas_info(void) 305 { 306 if(online == 1) //如果已经登录 307  { 308 printf("your old info:\n"); 309 int i = 0; 310 for(i=0; i<MAX_Passenger; i++) 311  { 312 if(strcmp(online_pid,ORD[i].pid)==0) 313  { 314 printf("pid:%s, pname:%s\npassword:%s, tell:%s\n",PAS[i].pid,PAS[i].pname,PAS[i].password,PAS[i].tell); 315 break; 316  } 317  } 318 char new_pid[20]; 319 char new_pname[10]; 320 char new_password[20]; 321 char new_tell[20]; 322 printf("please entry new pid:"); 323 get_str(new_pid,20); 324 printf("please entry new pname:"); 325 get_str(new_pname,10); 326 printf("please entry new password:"); 327 get_str(new_password,20); 328 printf("please entry new tell:"); 329 get_str(new_tell,20); 330  strcpy(PAS[i].pid,new_pid); 331  strcpy(PAS[i].pname,new_pname); 332  strcpy(PAS[i].password,new_password); 333  strcpy(PAS[i].tell,new_tell); 334 printf("change success\n"); 335  } 336 else if(online == -1) 337  { 338 printf("you have been locked,you can use this system now\n"); 339  } 340 else 341  { 342 printf("you have not login\n"); 343  } 344 } 345 346 // 开始查询航班 347 void search_start(void) 348 { 349 if(search()) 350  { 351 printf("1.order\n"); 352 printf("0.back\n"); 353 char cmd = get_cmd('0','1'); 354 if(cmd == '0') 355  { 356 return; 357 //start_sys(); 358  } 359 else 360  { 361 char fid[20]; // 选择的航班号 362 if(online == 1) // 如果已经登录 363  { 364 printf("please entry fid:"); 365 get_str(fid,20); 366 if(0 == strlen(fid)) 367  { 368 printf("fid is empty\n"); 369  } 370 int i = 0; 371 for(i=0; i<search_num; i++) 372  { 373 //printf("fid:%s s_fid:%s num:%d\n",fid,search_fid[i],search_fnum[i]); 374 if(strcmp(fid,search_fid[i])==0 && search_fnum[i]>0) //查询到对应航班 375  { 376 printf("order success\n"); 377 int j=0; 378 for(j=0; j<MAX_Flight; j++) // 遍历航班表 379  { 380 if(strcmp(fid,FLI[j].fid)==0) 381  { 382 FLI[j].fnum--; //票数减1 383 break; 384  } 385  } 386 int k=0; 387 for(k=0; k<MAX_Order; k++) // 遍历订票表 388  { 389 //printf("ready insert...\n"); 390 if(strlen(ORD[k].pid) == 0) // 在空位置插入数据 391  { 392 strcpy(ORD[k].pid,online_pid); // 插入当前用户身份证 393 strcpy(ORD[k].fid,search_fid[i]); // 插入当前选择的航班号 394 ORD[k].num = 1; 395 printf("insert_to_order success\n"); 396 break; 397  } 398  } 399 return; 400  } 401 else if(strcmp(fid,search_fid[i])==0 && search_fnum[i] == 0) 402  { 403 printf("no ticket\n"); 404  search_start(); 405  } 406 else if(i==MAX_Flight-1) 407  { 408 printf("don't have this fid\n"); 409  search_start(); 410  } 411  } 412  } 413 else if(online == -1) 414  { 415 printf("you have been locked,you can use this system now\n"); 416  } 417 else 418  { 419  login(); 420  } 421  } 422  } 423 } 424 425 // 查询航班 426 bool search(void) 427 { 428 printf("start: \n"); 429 get_str(start,10); 430 printf("end: \n"); 431 get_str(end,10); 432 int i=0; 433 search_num = 0; 434 for(i=0; i<MAX_Flight; i++) 435  { 436 if(strlen(start) == 0 || strlen(end) == 0) 437  { 438 printf("start or end can't be empty\n"); 439 return false; 440  } 441 if(strcmp(FLI[i].start,start)==0 && strcmp(FLI[i].end,end)==0) 442  { 443 printf("fid:%s, ticket_num:%d\n",FLI[i].fid,FLI[i].fnum); 444  strcpy(search_fid[search_num],FLI[i].fid); 445 search_fnum[search_num] = FLI[i].fnum; 446 //printf("search_fid[%d]:%s, search_fun[%d]:%d\n",search_num,search_fid[search_num],search_num,search_fnum[search_num]); 447 ++search_num; 448  } 449 if(0 == search_num && i == MAX_Flight-1) 450  { 451 printf("no flight\n"); 452 return false; 453  } 454 if(search_num > 0 && i == MAX_Flight-1) 455  { 456 //show_flight(); 457 return true; 458  } 459  } 460 } 461 462 // 输出订单信息 463 void order_list(void) 464 { 465 if(online == 1) 466  { 467 int i=0; 468 for(i=0; i<MAX_Order; i++) 469  { 470 if(strcmp(online_pid,ORD[i].pid)==0) 471  { 472 //printf("online_pid:%s\n",online_pid); 473 printf("fid:%s, pid:%s, ticket:%d\n",ORD[i].fid,ORD[i].pid,ORD[i].num); 474  } 475  } 476  } 477 else if(online == -1) 478  { 479 printf("you have been locked,you can use this system now\n"); 480  } 481 else 482  { 483  login(); 484  } 485 } 486 487 // 删除订单 488 void del_order(void) 489 { 490 if(online == 1) 491  { 492 char fid[20]; 493 printf("order_list:\n"); 494  order_list(); 495 printf("please entry del_order fid:"); 496 get_str(fid,20); 497 int i=0; 498 for(i=0; i<MAX_Order; i++) 499  { 500 if(strlen(fid)==0) //判空 501  { 502 printf("del_order fid can't be empty\n"); 503 return; 504  } 505 if(strcmp(fid,ORD[i].fid)==0) 506  { 507 memset(ORD[i].pid,'\0',sizeof(ORD[i].pid)); 508 int j=0; 509 for(j=0; j<MAX_Flight; j++) 510  { 511 if(strcmp(fid,FLI[j].fid)==0) 512  { 513 FLI[j].fnum++; // 返还飞机票 514 break; 515  } 516  } 517 printf("delete success\n"); 518 return; 519  } 520  } 521  } 522 else if(online == -1) 523  { 524 printf("you have been locked,you can use this system now\n"); 525  } 526 else 527  { 528  login(); 529  } 530 531 } 532 533 // 清理输入缓冲区 534 /*void clear_stdin(void) 535 { 536  stdin->_IO_read_ptr = stdin->_IO_read_end;//清理输入缓冲区 537 } 538 */ 539 540 // 读取输入字符串 541 char* get_str(char* str,size_t len) 542 { 543 if(NULL == str) 544  { 545 puts("empty ptr！"); 546 return NULL; 547  } 548 549 char *in=fgets(str,len,stdin); 550 551 size_t cnt = strlen(str); 552 if('\n' == str[cnt-1]) 553  { 554 str[cnt-1] = '\0'; 555  } 556 else 557  { 558 scanf("%*[^\n]"); 559 scanf("%*c"); 560  } 561 562 //clear_stdin(); 563 564 return str; 565 } 566 567 // 获取cmd命令 568 char get_cmd(char start,char end) 569 { 570 //clear_stdin(); 571 572 printf("please entry cmd:"); 573 while(true) 574  { 575 char val = getch(); 576 if(val >= start && val <= end) 577  { 578 printf("%c\n",val); 579 return val; 580  } 581  } 582 }