c++疑难杂症大杂烩

对于std::stringstream* 的使用：

#include 
#include 
#include 

void writerFun(std::stringstream* stream){
    *stream << "xxx\n";
    *stream << "yyy\n";
    *stream << "zzz\n";
}


void writerFun2(std::stringstream* stream){
    std::ostream *out;
    out = stream;
    *out << "xxx";
    *out << "yyy";
    *out << "zzz";
}


void readerFun(std::stringstream* stream){
    std::string str;
    while(*stream >> str){
        std::cout << str << std::endl;
    }
    
}

void readerFun2(std::stringstream* stream){
    std::istream *read;
    read = stream;
    std::string str;
    while(*read >> str){
        std::cout << str << std::endl;
    }
}

int main()
{
    std::stringstream ss;
    
    writerFun(&ss);
    // writerFun2(&ss);
    
    std::cout << ss.str();
    
    // readerFun(&ss);
    readerFun2(&ss);
}