Is such a program, have been an error that redefine, and each function redefinition, I very strange

 
//register. 
 c#include 
#include 
#include 
#include 
#include 
#include 
Int MIMA=111; 
Int Register_main (); 
Int Checkkname (char pattern []); 
Void admain_system (); 
Void verification_Code (); 
Void verification_Code2 (); 
Void log1 (char name [], char password []); 
Void reg (char name [], char password []); 
Int Seekname (char pattern []); 
Int Judge_aa (int j); 
Int assemble1 (char name [], char password []); 
Void New_file (); 

Int Register_main () 
{
New_file (); 
Admain_system (); 
Gongnengxuanze (); 
system("pause"); 
return 0; 
} 

Void admain_system ()//the user's system 
{
The static char name [20], "[20]. 
Char a, [100]. 

Printf (" new user? Yes, please enter 1; No, enter any key \ n "); 
gets(a); 

If (STRCMP (a, "1")==0)//registered 
{
Reg (name, password); 
} 
The else//login 
{
Log1 (name, password); 
} 
} 
Void reg (char name [], char password [])//registered 
{

The FILE * fp. 

Int flag=1, n=0; 
Temp2 char temp1 [20], [20], ch [3], temp3 [100], temp4 [200]="@ @"; 
Printf (" -- -- -- -- -- -- -- -- -- -- you to register, please -- -- -- -- -- -- -- -- -- -- - \ n "); 
While (flag) 
{
flag=0; 
Printf (" \ n username (length) within 10: "); 
Gets (name); 
While (Checkkname (name)) 
{
Printf (" the user name (length) within 10: \ n "); 
Gets (name); 
} 

Printf (" \ n password (length) within 10: "); 
Gets (temp1); 

Printf (" \ n please retype password: "); 
Gets (temp2); 
If (STRCMP (temp1, temp2)==0) 
Strcpy (password, temp1); 
The else 
flag=1; 

} 
Strcat (name, "$$"); 
Strcat (password, "@ @"); 

Fp=fopen (" C: \ \ \ \ account information the lost and found. TXT ", "a +"); 
If (fp==0) 
{
Printf (" file open failed \ n "); 
exit(1); 
} 
The fputs (name, fp); 

fclose(fp); 
Fp=fopen (" C: \ \ \ \ account information the lost and found. TXT ", "a +"); 
If (fp==0) 
{
Printf (" file open failed \ n "); 
exit(1); 
} 
The fputs (password, fp); 
rewind(fp); 
If (STRCMP (the fgets (ch 3, fp), "@ @")!=0) 
{
rewind(fp); 
The fgets (temp3, 100, fp); 
fclose(fp); 

Fp=fopen (" C: \ \ \ \ account information the lost and found. TXT ", "w +"); 
If (fp==0) 
{
Printf (" file open failed \ n "); 
exit(1); 
} 
Strcat (temp4, temp3); 
The fputs (temp4, fp); 
fclose(fp); 
} 
The else 
fclose(fp); 

Printf (" congratulations you registered success! \n"); 
Log1 (name, password); 
} 
Void log1 (char name [], char password [])//login 
{

The FILE * fp. 
Int flag=1, flag2=1, I=0, n, and judge; 
Temp2 char temp1 [20], [20], ch. 
Printf (" -- -- -- -- -- -- -- -- -- welcome login -- -- -- -- -- -- -- -- -- -- - \ n "); 
While (flag) 
{
flag=0; 

Printf (" user name: ");//type in user name 
Gets (temp1); 

N=strlen (temp1); 
Do {
Fp=fopen (" C: \ \ \ \ account information the lost and found. TXT ", "a +"); 
If (fp==0) 
{
Printf (" file open failed \ n "); 
exit(1); 
} 
rewind(fp); 
Printf (" \ n password: ");//type in passwords 
Gets (temp2); 
for(i=0; (ch=fgetc (fp))!='@'; I++)//password entry password 
"[I]=ch; 
fclose(fp); 
Judge=assemble1 (temp1, temp2);//judging function 
} while (judge); 
} 
//database import 
return; 
} 


Int assemble1 (char name [], char password [])//file user name password authentication module: Judge_aa, Seekname, judge_passage 
{
Int judge=0, x, a=1; 
X=Seekname (name); 
If (x> 0)//determine whether perform 
Judge=judge_passage (x, password); 
If (judge) 
{
Printf (" landing successful \ n "); 
return 0; 
} 
The else 
{
Printf (" please enter again \ n "); 
return 1; 
} 
} 
Int Judge_aa (int j)//double @ determine 
{
The FILE * fp. 
Char ch; 
Int I=0, flag=0, flag2; 
Fp=fopen (" C: \ \ \ \ account information the lost and found. TXT ", "r"); 
If (fp==0) 
{
Printf (" file open failed "); 
exit(1); 
} 
The fseek (fp, j + 2, 0); 
while(! Flag) 
{

While ((ch=fgetc (fp))! ) 
='@'{

i++; 
} 
If (ch=='@') 
{
i++; 
If ((ch=fgetc (fp))=='@') 
{
flag=1; 
- I; 
} 
} 


} 
fclose(fp); 
return i; 
} 

Int Seekname (char pattern [])//violence find user name 
{
The FILE * fp. 
Int k=0, j=0, I, sign=0, flag=0; 
Char text [100000], * p=text; 
Sign=strlen (pattern); 
Fp=fopen (" C: \ \ \ \ account information the lost and found. TXT ", "r"); 
If (fp==0) 
{
Printf (" file open failed \ n "); 
exit(1); 
} 
The fgets (text, 10000, fp);//read the form content 
fclose(fp); 

While (j<=(strlen (text) - strlen (pattern))) 
{
for(i=0; iIf (I==sign& & (text [1]=='@') & amp; & (text [j - 2]=='@') & amp; & Text [I + j]=='$' & amp; & Text [I + j + 1)=='$') 
{
flag=1; 
break; 
} 
The else 
+ + j; 
} 
If (flag==1) 
{
//printf (" with the user name "); 

Return j + I; 
} 
The else 
{
Printf (" username error \ n "); 
return 0; 
} 
} 
Int Checkkname (char pattern [])//check if there is a repeated username 
{
The FILE * fp. 
Int k=0, j=0, I, sign=0, flag=0; 
Char ch, text [100000], * p=text; 
Sign=strlen (pattern); 

Fp=fopen (" C: \ \ \ \ account information the lost and found. TXT ", "a +"); 
If (fp==0) 
{
Printf (" file open failed \ n "); 
exit(1); 
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