将ifstream传递给C++中的函数

我正在尝试为基因测序项目构建16个不同的后缀树。他们正在建造的主这样将ifstream传递给C++中的函数

int main() 
{ 
    ifstream fp; 
    fp.open("filepath", ifstream::in); 
    Tree I(fp); 
    fp.close();

我试图在我的构造此代码使用它们：

Tree::Tree(ifstream &fp) 
{ 
    string current = ""; 
    char* line; 
    fp.getLine(line, 100); //ignore first line 
    for(int i=0; i<100; i++)  
    { 
     char temp = (char)fp.get(); 
     if(temp=='\n')i--; 
     else current+=temp; 
    } 
    insert(current); 
    while(fp.good()) 
    { 
     current = current.substr(1,99); 
     char temp = (char)fp.get(); 
     if(temp=='\n')temp=(char)fp.get(); 
     if(temp==EOF) break; 
     current+=temp; 
     insert(current); 
    } 
}

当我尝试编译，我得到这些错误的每个实例其中我使用fp：

suffix.cpp: In constructor Tree::Tree(std::ifstream&) :
suffix.cpp:12: error: invalid use of undefined type struct std::basic_ifstream<char, std::char_traits<char> >
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../include/c++/4.1.2/iosfwd:89: error: declaration of struct std::basic_ifstream<char, std::char_traits<char> >
suffix.cpp:15: error: invalid use of undefined type struct std::basic_ifstream<char, std::char_traits<char> >
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../include/c++/4.1.2/iosfwd:89: error: declaration of struct std::basic_ifstream<char, std::char_traits<char> >

来源

2010-02-23 Jesse Welch