哪里出错了？c语音程序项目，请更改完善下

#include<stdio.h>#include<string.h>#define NUM 100typedef struct traininfor { char station[10][10]; char tnumber[20]; float price; int lnumber; char time[20];}pemp;struct ticket { char buyer[10]; char source[30]; char dest[30]; int bnumber;};void menu(pemp* pointtr, struct ticket* pointtk); //菜单 void buy(pemp* pointtr, struct ticket* pointtk);void returnt(pemp* pointtr, struct ticket* pointtk);void check(pemp* pointtr, struct ticket* pointtk);void show(pemp* pointtr, struct ticket* pointtk);void exit();void main(){ pemp traininformation[NUM]; struct ticket cheque[NUM]; pemp* pointtr; struct ticket* pointtk; pointtr = traininformation; pointtk = cheque; strcpy(pointtr->station[0], "1"); strcpy(pointtr->station[1], "2"); strcpy(pointtr->station[2], "3"); strcpy(pointtr->station[3], "4"); strcpy(pointtr->station[4], "5"); strcpy(pointtr->station[5], "6"); strcpy(pointtr->station[6], "7"); strcpy(pointtr->tnumber, "Train"); pointtr->price = 88.00; pointtr->lnumber = 50; strcpy(pointtr->time, "2012年12月21日11点22分"); pointtk->bnumber = 0; menu(pointtr, pointtk);}void menu(pemp* pointtr, struct ticket* pointtk) //菜单 { int a; //选项 printf("欢迎使用票务管理系统\n"); printf("1,查询车票 \n"); printf("2,购买车票 \n"); printf("3,退订车票\n"); printf("4,退出程序\n"); printf("请输入功能序号"); scanf("%d", &a); if (a == 1) { check(pointtr, pointtk); //按起始地目的地查找 menu(pointtr, pointtk); //显示菜单 } else if (a == 2) buy(pointtr, pointtk); //购买车票 else if (a == 3) returnt(pointtr, pointtk); //退订车票 else if (a == 4) { printf("谢谢使用"); exit(); }}void show(struct ticket pointtk, pemp pointtr) { printf("车次Train No.: "); printf("Spacecraft"); printf("起始地Source------>目的地Destination： "); printf("%s------>", pointtk->source); printf("%s\n", pointtk->dest); printf("到达时间 Arrival time: ", pointtk->source); printf("%s\n", pointtr->time); printf("票价Price: "); printf("%10.2f\n", pointtr->price); printf("车票数量Lnumber: "); printf("%d\n", pointtr->lnumber);}void check(pemp pointtr, struct ticket pointtk) { int i, j, count = 0; char sour[10]; char dest[10]; printf("请输入起始地: \n"); scanf("%s", sour); printf("请输入目的地：\n"); scanf("%s", dest); for (i = 0; i < NUM; i++) { if (strcmp(pointtr->station[i], sour) == 0) { //查找第一个车站 for (j = 0; j < NUM; j++); { if (strcmp(pointtr->station[j], dest) == 0) { //查找第二个车站 strcpy(pointtk->source, pointtr->station[i]); //将车站写入车票结构体 strcpy(pointtk->dest, pointtr->station[j]); show(pointtk, pointtr); count++; break; } } } } if (count == 0) { printf("无信息\n"); strcpy(pointtk->source, "0"); //没有找到，车站为空 strcpy(pointtk->dest, "0"); return; }}void buy(pemp* pointtr, struct ticket* pointtk) //购买车票{ char choice[10]; //记录选项 int buynumber; printf("请输入您的姓名：\n"); scanf("%s", pointtk->buyer); //输入名字 check(pointtr, pointtk); //查询是否有相应车票 if ((strcmp(pointtk->dest, "0")) == 0) //如果没有，给出提示信息 { printf("无此站！返回菜单\n"); menu(pointtr, pointtk); } else { printf("您确定购买此车票吗1.是YES 2.否NO"); scanf("%s", choice); if ((strcmp(choice, "1")) == 0) { printf("请输入您要购买的张数：\n"); {scanf("%d", &buynumber); if (buynumber < 0) return; } if (((pointtr->lnumber) - buynumber) >= 0) { printf("购买成功！返回菜单\n"); pointtk->bnumber = buynumber; (pointtr->lnumber) -= buynumber; menu(pointtr, pointtk); } else { printf("车票已售完或不足，不能购买！返回菜单\n"); menu(pointtr, pointtk); } } else if ((strcmp(choice, "2")) == 0) //放弃购买 { printf("放弃购买！返回菜单\n"); menu(pointtr, pointtk); } else { menu(pointtr, pointtk); printf("错误！返回菜单\n"); menu(pointtr, pointtk); } }}void returnt(pemp* pointtr, struct ticket* pointtk) { char choice[10]; //记录选项 printf("您确定要退票吗？1.是Yes 2.否No\n"); //确认是否退票 scanf("%s", choice); if ((strcmp(choice, "1")) == 0) { printf("退票成功\n"); pointtr->lnumber += pointtk->bnumber; menu(pointtr, pointtk); } else if ((strcmp(choice, "2")) == 0) { printf("放弃退票 \n"); menu(pointtr, pointtk); } else { menu(pointtr, pointtk); printf("错误返回菜单 \n"); menu(pointtr, pointtk); }}void exit(){ exit();}

show方法存在冲突
代码格式化一下