#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<iostream.h>
#include<windows.h>

void shuru()
{       FILE*fp;
      char filename[20];
      int i;
      i=0;
      char s[1000];
      printf("请输入所用的文件名：");
      scanf("%s",filename);
      if ((fp=fopen(filename,"w"))==NULL);
      {   printf("无法打开文件\n");
          exit(0);
      }
         printf("请输入字符：");
    scanf("%c",s[0]);
    while (s[i] !='#')
    {      scanf("%c",&s[++i]);
      fprintf(fp,"%c",s[i]);
    }
    return 0;
}

int main()
{      int x;
loop:printf("\n请输入需要操作(0退出程序):\n\n");
     printf(" 1.输入保存   2.最长不重复子串   3.最长回文串    4.字符概率\n\n");
     printf(" 5.哈夫曼编码   6.二进制文件       7.二进制解码    8.对比\n\n");
    scanf("%d",&x);
    switch(x)
    {
    case 1: shuru();goto loop;
//    case 1:minganchuan(a,n);goto loop;
//    case 2:buchongfu(a,n);goto loop;
//    case 3:huiwen(a,n);goto loop;
//    case 4:gailv(a,n);goto loop;
//    default:printf("wrong!");
    }
}

c(12) : error C2143: syntax error : missing ';' before 'type'
F:\VC6.0完整(www.)\MyProjects\practice\22\2.c(21) : error C2065: 's' : undeclared identifier
F:\VC6.0完整(www.)\MyProjects\practice\22\2.c(21) : error C2109: subscript requires array or pointer type
F:\VC6.0完整(www.)\MyProjects\practice\22\2.c(22) : error C2109: subscript requires array or pointer type
F:\VC6.0完整(www.)\MyProjects\practice\22\2.c(23) : error C2109: subscript requires array or pointer type
F:\VC6.0完整(www.)\MyProjects\practice\22\2.c(23) : error C2102: '&' requires l-value
F:\VC6.0完整(www.)\MyProjects\practice\22\2.c(24) : error C2109: subscript requires array or pointer type
F:\VC6.0完整(www.)\MyProjects\practice\22\2.c(26) : warning C4098: 'shuru' : 'void' function returning a value
执行 cl.exe 时出错.

2.obj - 1 error(s), 0 warning(s)
为什么会出现这么多错误

请说清楚点谢谢

明白