foo.cc:6:25: error: conflicting declaration 'int a'
 int Findmax(int a[],int a);
                         ^
foo.cc:6:19: note: previous declaration as 'int* a'
 int Findmax(int a[],int a);
                   ^
foo.cc:7:25: error: conflicting declaration 'int a'
 int Findmin(int a[],int a);
                         ^
foo.cc:7:19: note: previous declaration as 'int* a'
 int Findmin(int a[],int a);
                   ^
foo.cc: In function 'int main()':
foo.cc:15:16: error: void value not ignored as it ought to be
  int n=Input (a);
                ^
foo.cc:16:12: error: too many arguments to function 'void Output(int*)'
  Output(a,n);
            ^
foo.cc:5:6: note: declared here
 void Output (int a[]);
      ^~~~~~
foo.cc:18:6: error: 'imax' was not declared in this scope
  max=imax;min=imin;
      ^~~~
foo.cc:18:6: note: suggested alternative: 'max'
  max=imax;min=imin;
      ^~~~
      max
foo.cc:18:15: error: 'imin' was not declared in this scope
  max=imax;min=imin;
               ^~~~
foo.cc:18:15: note: suggested alternative: 'min'
  max=imax;min=imin;
               ^~~~
               min
foo.cc:19:32: error: invalid conversion from 'int*' to 'int' [-fpermissive]
  int k=Search(a,n,min,max,index);
                                ^
foo.cc:8:5: note:   initializing argument 5 of 'int Search(int*, int, int, int, int)'
 int Search(int a[], int n, int min, int max, int index);
     ^~~~~~
foo.cc:20:6: error: 'iint' was not declared in this scope
  for(iint i=0;i<k;i++)
      ^~~~
foo.cc:20:6: note: suggested alternative: 'uint'
  for(iint i=0;i<k;i++)
      ^~~~
      uint
foo.cc:20:15: error: 'i' was not declared in this scope
  for(iint i=0;i<k;i++)
               ^
foo.cc:22:11: error: 'idex' was not declared in this scope
   cout<<a[idex[i]]<<endl;
           ^~~~
foo.cc:22:11: note: suggested alternative: 'index'
   cout<<a[idex[i]]<<endl;
           ^~~~
           index
foo.cc: In function 'int main()':
foo.cc:27:5: error: redefinition of 'int main()'
 int main()
     ^~~~
foo.cc:12:5: note: 'int main()' previously defined here
 int main()
     ^~~~
foo.cc:29:7: error: 'a' was not declared in this scope
  cin>>a[];
       ^
foo.cc:29:9: error: expected primary-expression before ']' token
  cin>>a[];
         ^
foo.cc:30:11: error: expected primary-expression before ']' token
  return a[];
           ^
foo.cc: In function 'int main()':
foo.cc:34:5: error: redefinition of 'int main()'
 int main()
     ^~~~
foo.cc:12:5: note: 'int main()' previously defined here
 int main()
     ^~~~
foo.cc:36:9: error: 'a' was not declared in this scope
  return a[];
         ^
foo.cc:36:11: error: expected primary-expression before ']' token
  return a[];
           ^
foo.cc: At global scope:
foo.cc:39:25: error: conflicting declaration 'int a'
 int Findmin(int a[],int a)
                         ^
foo.cc:39:19: note: previous declaration as 'int* a'
 int Findmin(int a[],int a)
                   ^
foo.cc: In function 'int Findmin(int*)':
foo.cc:42:16: error: 'n' was not declared in this scope
  for(int i=1;i<n;i++)
                ^
foo.cc:44:13: error: 'imin' was not declared in this scope
   if(a[i]<a[imin])
             ^~~~
foo.cc:44:13: note: suggested alternative: 'ima'
   if(a[i]<a[imin])
             ^~~~
             ima
foo.cc:47:9: error: 'imin' was not declared in this scope
  return imin;
         ^~~~
foo.cc:47:9: note: suggested alternative: 'ima'
  return imin;
         ^~~~
         ima
foo.cc:41:6: warning: unused variable 'ima' [-Wunused-variable]
  int ima=0;
      ^~~
foo.cc: At global scope:
foo.cc:50:25: error: conflicting declaration 'int a'
 int Findmax(int a[],int a)
                         ^
foo.cc:50:19: note: previous declaration as 'int* a'
 int Findmax(int a[],int a)
                   ^
foo.cc: In function 'int Findmax(int*)':
foo.cc:53:17: error: 'n' was not declared in this scope
  for(int i=0; i>n;i--)
                 ^
foo.cc: In function 'int Search(int*, int, int, int, int)':
foo.cc:63:9: error: declaration of 'int a [5]' shadows a parameter
  int a[5],index[10];
         ^
foo.cc:63:19: error: declaration of 'int index [10]' shadows a parameter
  int a[5],index[10];
                   ^
foo.cc:64:6: error: declaration of 'int n' shadows a parameter
  int n=Input (a);
      ^
foo.cc:64:16: error: void value not ignored as it ought to be
  int n=Input (a);
                ^
foo.cc:65:12: error: too many arguments to function 'void Output(int*)'
  Output(a,n);
            ^
foo.cc:5:6: note: declared here
 void Output (int a[]);
      ^~~~~~
foo.cc:66:6: error: declaration of 'int max' shadows a parameter
  int max,min;
      ^~~
foo.cc:66:10: error: declaration of 'int min' shadows a parameter
  int max,min;
          ^~~
foo.cc:67:6: error: 'imax' was not declared in this scope
  max=imax;min=imin;
      ^~~~
foo.cc:67:6: note: suggested alternative: 'max'
  max=imax;min=imin;
      ^~~~
      max
foo.cc:67:15: error: 'imin' was not declared in this scope
  max=imax;min=imin;
               ^~~~
foo.cc:67:15: note: suggested alternative: 'min'
  max=imax;min=imin;
               ^~~~
               min
foo.cc:68:32: error: invalid conversion from 'int*' to 'int' [-fpermissive]
  int k=Search(a,n,min,max,index);
                                ^
foo.cc:61:5: note:   initializing argument 5 of 'int Search(int*, int, int, int, int)'
 int Search(int a[], int n, int min, int max, int index)
     ^~~~~~
foo.cc: At global scope:
foo.cc:78:1: error: expected unqualified-id before '{' token
 {
 ^
foo.cc:87:1: error: expected unqualified-id before '{' token
 {
 ^
foo.cc: In function 'int Unijque(int*, int)':
foo.cc:98:25: error: too few arguments to function 'int Search(int*, int, int, int, int)'
   if(Search ( a,i-k,a[i])!=-1)
                         ^
foo.cc:61:5: note: declared here
 int Search(int a[], int n, int min, int max, int index)
     ^~~~~~
foo.cc:103:11: error: 'i' was not declared in this scope
  return a[i]; 
           ^

自豪的采用HydroJudge(https://github.com/hydro-dev/Hydro)进行评测。