What is ** in C++?

Question

I\'ve seen some code, as well as some errors generated from my compiler that have a \'**\' token before the variable (eg **variablename unreferenced-- or someth

Answer 1

You may recognize the signature for main():

int main(int argc, char* argv[])

The following is equivalent:

int main(int argc, char** argv)

In this case, argv is a pointer to an array of char*.

In C, the index operator [] is just another way of performing pointer arithmetic. For example,

foo[i]

produces the same code as

*(foo + i)