In the CPU code, incrementing elements of the array “a” is performed sequentially in the do loop by a single CPU thread. In the CUDA Fortran version, the subroutine is executed by many GPU threads concurrently. Each thread identifies itself via the built-in threadIdx variable that is ...
在我们的情况下,该条件就是在变量var达到其最终值stop。 所述循环体执行后,控制流跳转回至increment 语句。这个语句可以更新循环控制变量var。 条件现在重新评估。如果为true,循环执行的过程重复(循环体,再递增一步,然后再条件)。直到条件为假,循环终止。 示例1 这个例子将输出数字11到20: program printNumimplicitn...
Bill, what he is saying is that it is not sufficient to use an INTEGER(8) for the loop index variable, you must also use INTEGER(8) values for the start and end values (and ideally the increment). The standard specifies how the number of iterations is determined and it isn't based ...
A DO loop length evaluating part 4 calculates the DO loop length based on the initial value, the final- value and the increment value of the control variable contained in each DO loop. Then a DO loop length sorting part 5 sorts those obtained loop lengths in the order of larger values, ...
Then a DO loop length sorting part 5 sorts those obtained loop lengths in the order of larger values, and a control variable change range changing part 6 switches the initial value, the final value and the increment value of the control variable among the loops so as to secure the largest...
(status==0)THEN readloop:DO !读取数据 READ(100,*,IOSTAT=status,IOMSG=msg)data !读取N+1行数据 IF(status/=0)EXIT !如果读取过程失败则退出循环 N=N+1 !读取成功记录读取行数 WRITE(110,'(F10.5)')data !计入到OUTPUT WRITE(*,'(F10.5)')data !显示到屏幕 END DO readloop !读取文件过程中...
DOloop-control@ wheresis a statement number. The form ofloop-controlis variable=e1,e2[,e3] Parameter Description variable Variable of type integer, real, or double precision. e1,e2,e3 Expressions of type integer, real or double precision, specifying initial, limit, and increment values respectiv...
‣ The tightly-nested DO loops must have invariant loop limits: the lower limit, upper limit, and increment must be invariant with respect to any other loop in the kernel do. ‣ The invariant loop limits cannot be a value from an array expression, unless those arrays have the managed ...
program loop_control implicit none integer :: i do i = 1, 10 if (i == 3) then cycle ! 跳过i等于3的迭代 elseif (i == 8) then exit ! 退出循环 endif write(*,*) i end do stop ! 停止程序的执行 end program loop_control
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