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uni-m.cds-adv-prog/ex4.2/CaloGrid.cc

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//CaloGrid.cc
#include <iostream>
#include "CaloGrid.hh"
CaloCell* CaloGrid::cell( int x, int y ) {
if ( x >= nx or x < 0 ) {
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std::cout << "CaloGrid::cell() Error: out of grid (x)" << std::endl ;
return nullptr;
}
if ( y >= ny or y < 0 ) {
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std::cout << "CaloGrid::cell() Error: out of grid (y)" << std::endl ;
return nullptr;
}
return &cells[ x*nx + y ] ;
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}