开发环境：CodeBlocks
开发语言：C
实现功能：登录，订票，退票
数据存储：文本读写
涉及文件：
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ER图：
数据库：
类图：
用例图：
订票顺序图：
订票状态图：
登录活动图：
以上图片仅供参考，请自行斟酌
程序主界面：
源码如下：
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... "); 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 ",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 ",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 ",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 ",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... "); 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... "); 143 FILE* ofwp = fopen("order.txt","w"); 144 printf("ready insert order.txt "); 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 ",ORD[i].pid,ORD[i].fid,ORD[i].num); 152 //printf("insert order.txt success "); 153 } 154 } 155 156 FILE* ffwp = fopen("flight.txt","w"); 157 printf("insert flight.txt "); 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 ",FLI[i].fid,FLI[i].fname,FLI[i].start,FLI[i].end,FLI[i].fnum); 164 //printf("insert flight.txt success "); 165 } 166 } 167 168 FILE* pfwp = fopen("passenger.txt","w"); 169 printf("insert passenger.txt "); 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 ",PAS[i].pid,PAS[i].pname,PAS[i].password,PAS[i].tell); 176 //printf("insert passenger.txt success "); 177 } 178 } 179 // 释放内存、保存数据 180 free(FLI); 181 free(PAS); 182 free(ORD); 183 printf("exit... "); 184 } 185 186 // 生成主菜单 187 void menu(void) 188 { 189 printf(" "); 190 printf("******************************** "); 191 printf("| | "); 192 printf("| flight order system | "); 193 printf("* 1.search_flight * "); //查询航班 194 printf("| 2.order_list | "); //查询订票信息 195 printf("* 3.del_order * "); //退订 196 printf("| 4.passenger_info | "); //查询旅客信息 197 printf("* 5.change_pas_info * "); //修改旅客信息 198 printf("| 6.login | "); //用户登录 199 printf("* 7.logout * "); //用户登出 200 printf("| 0.exit_sys | "); //退出系统 201 printf("| | "); 202 printf("******************************** "); 203 //printf(" "); 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! "); 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 "); 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! "); 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 "); 240 time++; 241 } 242 } 243 } 244 online = -1; 245 printf("you have been locked,you can use this system now "); 246 } 247 else if(online ==1) 248 { 249 printf("you have been login "); 250 } 251 else 252 { 253 printf("you have been locked,you can use this system now "); 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 "); 265 } 266 else if(online == -1) 267 { 268 printf("you have been locked,you can use this system now "); 269 } 270 else 271 { 272 printf("you have not login "); 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 ",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 "); 296 } 297 else 298 { 299 printf("you have not login "); 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: "); 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 password:%s, tell:%s ",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 "); 335 } 336 else if(online == -1) 337 { 338 printf("you have been locked,you can use this system now "); 339 } 340 else 341 { 342 printf("you have not login "); 343 } 344 } 345 346 // 开始查询航班 347 void search_start(void) 348 { 349 if(search()) 350 { 351 printf("1.order "); 352 printf("0.back "); 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 "); 369 } 370 int i = 0; 371 for(i=0; i<search_num; i++) 372 { 373 //printf("fid:%s s_fid:%s num:%d ",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 "); 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... "); 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 "); 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 "); 404 search_start(); 405 } 406 else if(i==MAX_Flight-1) 407 { 408 printf("don't have this fid "); 409 search_start(); 410 } 411 } 412 } 413 else if(online == -1) 414 { 415 printf("you have been locked,you can use this system now "); 416 } 417 else 418 { 419 login(); 420 } 421 } 422 } 423 } 424 425 // 查询航班 426 bool search(void) 427 { 428 printf("start: "); 429 get_str(start,10); 430 printf("end: "); 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 "); 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 ",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 ",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 "); 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 ",online_pid); 473 printf("fid:%s, pid:%s, ticket:%d ",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 "); 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: "); 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 "); 503 return; 504 } 505 if(strcmp(fid,ORD[i].fid)==0) 506 { 507 memset(ORD[i].pid,' ',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 "); 518 return; 519 } 520 } 521 } 522 else if(online == -1) 523 { 524 printf("you have been locked,you can use this system now "); 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(' ' == str[cnt-1]) 553 { 554 str[cnt-1] = ' '; 555 } 556 else 557 { 558 scanf("%*[^ ]"); 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 ",val); 579 return val; 580 } 581 } 582 }