Language in C perguntas e respostas de entrevista
Question: How can I find the day of the week of a given date?
Answer: The following code snippet shows how to get the day of week from the given date.dayofweek ( int yy, int mm, int dd ) { /*Monday = 1 and Sunday = 0 */ /* month number >= 1 and <= 12, yy > 1752 or so */ static int arr[ ] = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 } ; yy = yy - mm < 3 ; return ( yy + yy / 4 - yy / 100 + yy / 400 + arr[ mm - 1] + dd ) % 7 ; } void main( ) { printf ( "nnnDay of week : %d ", dayofweek ( 2002, 5, 18 ) ) ; } |
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