小白求助C++问题，在线等

void StudentList::DeleteStudent(string s)
{
vector ::iterator p1;
p1=stuArr.begin();
if (stuArr.size()==0)
{
cout<<"当前列表没有元素可以删除"< }
else
{
while (p1!=stuArr.end())
{
if(p1->GetName()=s)
{
stuArr.erase(p1);
}
}
}
}
编译C:Documents and SettingsAdministrator桌面实验9实验9StudentList.cpp(27) : error C2451: conditional expression of type 'class std::basic_string,class std::allocator >' is illegal
No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called
Error executing cl.exe.
StudentList.obj - 1 error(s), 0 warning(s)