Syntax Error if statement

[jacksparrow]

Hi

i got syntax error in if statement ,, i checked the line i put { after the condition don't know where the mistake are

1>c:\users\hani\test11\test11\code.cpp(20) : error C2143: syntax error : missing ';' before 'if'

# include <iostream>
using namespace std;
int seqsearch (int list[],int length,int key);
void main () {
    int marks [30];
    int length;
    int key;

    cout << " Enter number of students : "<<endl;
    cin >> length;

    for ( int i=0; i<length; i++)
        cin >> marks[i];

    cout << " Enter the key : "<<endl;
    cin >>key;

    int pos;
    pos = seqsearch ( marks , length , key )
        if ( pos == -1 ){
            cout << " the key is not found ";
        }
        else {
            cout << " the key at position"<<pos<<endl;
        }
    
}

int seqsearch (int list[],int length,int key) {
    for ( int i=0; i<length; i++)
        if ( list[i] == key)
            return i;
    return -1;
}