求助 学生成绩系统

#include <stdio.h>
#include <conio.h>
#include <string.h>
#include <stdlib.h>
long Search(char s[]);
struct student_type
{  char num[11];
   char name[11];
   char classid[11];
   float score[7];
   float total;
}studentl;
main()
{int i=0;
char c,ch1[10]={"123456"},ch2[]={0,0,0,0,0,0,0,0,0,0,0,0};
   printf("\n");
      printf("\n");
      printf("\n");
      printf("\n");
      printf("\n");
      printf("\n");
      printf("\t\t____________________________________\n");
      printf("\t\t|                               |\n");
      printf("\t\t|请输入密码，按【Enter】键结束：|\n");
      printf("\t\t|                               |\n");
      printf("\t\t____________________________________\n");
  while((c=getch())&&c!=13)
  {putchar('*');
  ch2[i++]=c;
  }
  if(!strcmp(ch1,ch2))
      printf("\n密码输入正确\n");
      else
      printf("\n密码输入不正确\n");
      system("color 4");

{ char cho;
  while(1)
  {
      system("cls");
      printf("\n");
      printf("\n");
      printf("\n");
      printf("\n");
      printf("\n");
      printf("\n");
      printf("\t======================学生成绩管理系统=======================\n");
      printf("\t              1.学生成绩录入            2.学生成绩修改     \n");
      printf("\t              3.学生成绩删除            4.学生成绩浏览     \n");
       printf("\t              5.学生成绩查询            6.学生成绩统计     \n");
      printf("\t              7.学生成绩单打印          8.退出             \n");
      printf("\t=============================================================\n");            
      printf("请选择功能(1~8):");
      printf("\n");
system("title 学生成绩管理系统");
system("color F1");
system("pause");
while(1)
{
    cho=getch();
if(cho>='1'&& cho<='8')break;
}
switch(cho)
{
case'1':Add();break;
case'2':Revise();break;
case'3':Delete();break;
case'4':Display();break;
case'5':LookFor();break;
case'6':Ccount();break;
case'7':Print();break;
case'8':
    {printf("你确定要退出系统吗（Y/N）?");
            cho=getch();
            if(cho=='y'||cho=='Y')exit(0);
}
}
}
}
找不出来错在哪了。
感谢大神