C Primer Plus 第十三章第十三題

13. Digital images, particularly those radioed back from spacecraft, may have glitches. Add a de-glitching function to programming exercise 12. It should compare each value to its immediate neighbors to the left and right, above and below. If the value differs by more than 1 from each of its neighbors, replace the value with the average of the neighboring values. You should round the average to the nearest integer value. Note that the points along the boundaries have fewer than four neighbors, so they require special handling

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