インテル® Fortran コンパイラー XE 13.1 ユーザー・リファレンス・ガイド
Portability Subroutine: Seeds the random number generator used with IRAND and RAND.
SRAND seeds the random number generator used with IRAND and RAND. Calling SRAND is equivalent to calling IRAND or RAND with a new seed.
The same value for iseed generates the same sequence of random numbers. To vary the sequence, call SRAND with a different iseed value each time the program is executed.