27 lines
688 B
Fortran
27 lines
688 B
Fortran
program sample3
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use omp_lib
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implicit real(8)(a-h,o-z)
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parameter (n=4096)
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real(8) a(n,n),c(n,n)
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real(4) b(n,n)
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real*8 t1, t2
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a=0.0d0
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call random_number(b)
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call random_number(c)
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write(6,50) 'Matrix Size = ', n
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50 format(1x,a,i5)
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t1 = omp_get_wtime()
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!$OMP parallel do
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do j=1,n
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do k=1,n
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do i=1,n
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a(i,j)=a(i,j)+b(i,k)*c(k,j)
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end do
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end do
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end do
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!$OMP end parallel do
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write(6,60) 'Execution Time = ', t2-t1, ' sec','A(n,n) = ',a(n,n)
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60 format(1x,a,f10.3,a,1x,a,d24.15)
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stop
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end |