Printing an integer with internal spacing and plus sign : cout « Development « C++ Tutorial

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

#include <iomanip>
using std::setw;

int main()
{
   cout << internal << showpos << setw( 10 ) << 123 << endl;
   return 0;
}

+      123