# Visual C++ strange arithmetic (hope such arithmetic does not apply to Microsoft accountancy;-))

**From:** claude uq (*c.dietrich_at_uq.edu.au*)

**Date:** 12/17/03

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Date: Wed, 17 Dec 2003 14:55:11 +1000

What could be a simpler snippet than this

#include <iostream>

using std::cout;

using std::endl;

int main() {

long nx = 200L;

long ny = 300L;

long gridSize = 0L;

long var = 0L;

gridSize = nx*ny;

var = gridSize*gridSize;

cout<<gridSize<<" "<<var<<endl;

system("pause");

return 0;

}

When executed, the above streams out 60000 for gridSize and -694967296 for

var !!!

Tried on a few machine, still same. What's going on here.

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