Using atol : convert from string « Data Types « C++ Tutorial

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2. Data Types
3. convert from string

#include <iostream>
using std::cout;
using std::endl;

#include <cstdlib>
using std::atol;

int main()
{
   long x = atol( "1000000" );

   cout << x / 2 << endl;
   return 0;
}

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