How to convert a command-line argument to int?

Question

I need to get an argument and convert it to an int. Here is my code so far:

#include 


using namespace std;
int main(int argc,int argvx[]) {         


        

Answer 1

std::stoi from string could also be used.

    #include 

    using namespace std;

    int main (int argc, char** argv)
    {
         if (argc >= 2)
         {
             int val = stoi(argv[1]);
             // ...    
         }
         return 0;
    }