StringStream to Character conversion.

See more:

C++

I have a file abc.txt which i need to read line by line and extract tokens from it.

while( getline( x, s1 ) )
{
string s2=s1.str()
strtok( s2, seps );					
}

In the code above i am taking an input stringstream from the file x submitted by the user and using it in s1. thereafter i am using a loop as many times i get to read a line. now i need to use the value of s1 which equals string of first line, in the strtok function's parameter. strtok does not accepts this. i converted s1 stringstream to s2 string. even then strtok is not accepting s2.

The error is ;

hw2.cpp:57: error: request for member 'str' in 'st', which is of non-class type 'char [1]'
hw2.cpp:66: error: cannot convert 'std::string' to 'char*' for argument '1' to 'char* strtok(char*, const char*)'
hw2.cpp:59: warning: unused variable 'cstr1'