Can variable name be same as Function name in C++?

In the above code lis is an array as well as a function name with same return type (int), I didn't get any error, Can anybody explain what is happening in the background? Why is the compiler not showing an error?

int lis( int arr[], int n )  
{  

int lis[n]; 
lis[0] = 1;    
for (int i = 1; i < n; i++ )  
{ 
    lis[i] = 1; 
    for (int j = 0; j < i; j++ )   
        if ( arr[i] > arr[j] && lis[i] < lis[j] + 1)  
            lis[i] = lis[j] + 1;  
}