Question

I have a variable:

string item;

It gets initialized at run-time. I need to convert it to long. How to do it? I have tried atol() and strtol() but I always get following error for strtol() and atol() respectively:

cannot convert 'std::string' to 'const char*' for argument '1' to 'long int strtol(const char*, char**, int)'

cannot convert 'std::string' to 'const char*' for argument '1' to 'long int atol(const char*)'

Answer 1

Try like this:

long i = atol(item.c_str());