Error c2143: syntax error: Missing '; 'before''

Problem:

About error c2143: syntax error: Missing '; 'before' <class-head>' and its solution.

Explanation:

The meaning of this sentence is to add ";" in front of the class.

Error code:

# Include <iostream>
Using namespace STD;

# Define Max size 100
Typedef int datetype

Class sequenlist
{
PRIVATE:
Datetype data [maxsize];
Int Len;
Public:
Void initiate ();
Int length ();
Int insert (datetype X, int I );
Int delet (int I );
Int locate (datetype X );
Datetype get (int I );
};
Void sequenlist: initiate ()
{
Len = 0;
}
Int sequenlist: length ()
{
Return len;
}
Int sequenlist: insert (DateType x, int I)
{
Int j;
If (len> = maxsize ){
Cout <"overflow! \ N ";
Return 0;
} Else if (I <1) | (I> len + 1 )){
Cout <"position is not correct! \ N ";
Return 0;
} Else {
For (j = len; j> = I; j --)
Data [j] = data [j-1];
Len ++;
Return 1;
}
}
Int sequenlist: delet (int I)
{
Int j;
If (I <1) | (I> len )){
Cout <"position is not supported CET! \ N ";
Return 0;
} Else {
For (j = I; j <len; j ++)
Data [j-1] = data [j];
Len --;
Return 1;
}
}
Int sequenlist: locate (DateType x)
{
Int j = 0;
While (j <len) & (data [j]! = X ))
J ++;
If (j <len)
Return j + 1;
Else
Return 0;
}
DateType sequenlist: get (int I)
{
If (I <1) & (I> len ))
Cout <"position is not correct! \ N ";
Else
Return data [I-1];
}

Int main ()
{
 
Return 0;
}

 

 

Code after modification:

 

# Include <iostream>
Using namespace std;

# Define Max size 100
Typedef int DateType;

Class sequenlist
{
Private:
DateType data [maxsize];
Int len;
Public:
Void initiate ();
Int length ();
Int insert (DateType x, int I );
Int delet (int I );
Int locate (DateType x );
DateType get (int I );
};
Void sequenlist: initiate ()
{
Len = 0;
}
Int sequenlist: length ()
{
Return len;
}
Int sequenlist: insert (DateType x, int I)
{
Int j;
If (len> = maxsize ){
Cout <"overflow! \ N ";
Return 0;
} Else if (I <1) | (I> len + 1 )){
Cout <"position is not correct! \ N ";
Return 0;
} Else {
For (j = len; j> = I; j --)
Data [j] = data [j-1];
Len ++;
Return 1;
}
}
Int sequenlist: delet (int I)
{
Int j;
If (I <1) | (I> len )){
Cout <"position is not supported CET! \ N ";
Return 0;
} Else {
For (j = I; j <len; j ++)
Data [j-1] = data [j];
Len --;
Return 1;
}
}
Int sequenlist: locate (DateType x)
{
Int j = 0;
While (j <len) & (data [j]! = X ))
J ++;
If (j <len)
Return j + 1;
Else
Return 0;
}
DateType sequenlist: get (int I)
{
If (I <1) & (I> len ))
Cout <"position is not correct! \ N ";
Else
Return data [I-1];
}

Int main ()
{
 
Return 0;
}

 

Follow-up:

I read the code of a book. The typedef book didn't contain semicolons, which misled me.