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2002-06-11
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C
C PAGE 161: NUMERICAL MATHEMATICS AND COMPUTING, CHENEY/KINCAID, 1985
C
C FILE: TRAP.FOR
C
C TRAPEZOID RULE PROGRAMMING EXPERIMENT FOR AN INTEGRAL
C
DATA N/60/
F(X) = 1.0/EXP(X*X)
H = 1.0/(N-1)
SUM = 0.5*(F(0.0) + F(1.0))
DO 2 I=2,N-1
XI = (I-1)*H
SUM = SUM + F(XI)
2 CONTINUE
SUM = H*SUM
PRINT *,SUM
STOP
END