Using getchar() on c gets the ‘Enter’ after input [duplicate]

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getchar() returns the first character in the input buffer, and removes it from the input buffer. But other characters are still in the input buffer (\n in your example). You need to clear the input buffer before calling getchar() again: 

void clearInputBuffer() // works only if the input buffer is not empty
{
    do 
    {
        c = getchar();
    } while (c != '\n' && c != EOF);
}

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