program array_declaration implicit none ! 声明一维数组 integer :: arr1(10) real :: arr2(5) character(len=10) :: arr3(3) ! 声明二维数组 integer :: matrix(3, 4) real :: grid(5, 5) ! 声明三维数组 real :: cube(3, 3, 3) end program array_declaration 3. 初始化数组 在Fortran...
For large array sizes, the automatic declaration produced a "signal 11" seg fault crash. The above solution works. However, in the above declaration of the arraysone has to include the "allocatable" keyword to make it work, e.g. real(kind=8),allocatable ::a(:),... accompan...
programprogram_nameimplicitnone! type declaration statements! executable statementsendprogramprogram_name Fortran中的一个简单程序 让我们编写一个程序,添加两个数字并打印结果 - programaddNumbers! This simple program adds two numbersimplicitnone! Type declarationsreal:: a, b, result! Executable statementsa =...
Example: Declare a two-by-three array with the declarator: REAL M(2,3) With the above declaration, you can assign a value to a particular element, as follows: M(1,2) = 0.0 The above code assigns0.0to the element in row 1, column 2, of arrayM. ...
Consider specifying a larger integer data size (modify source program or, for an INTEGER declaration, possibly use the f90 option -integer_size nn ). 71 1 severe (71): Integer divide by zero FOR$IOS_INTDIV. During an 58、 integer arithmetic operation, an attempt was made to divide by ...
Since the Fortran array can now be modified not only directly but also indirectly by thendarray, it is necessary to add theasynchronousattribute to the Fortran array declaration, since without it compiler optimization related bugs can occur (depending on code, compiler and compiler options). Alterna...
SUBROUTINEsubroutine_name(argument_list)...(Declarationsection)...(Excutionsection)...RETURNEND SUBROUTINE[subroutine_name] 每个子例程是个独立的程序单元,它开始于SUBROUTINE 语句,结束于END SUBROUTINE语句。它的编译也独立于主程序和其他的过程。因为程序中的每个程序单元都是独立进行编译的,局部变量名和语句标号...
array(:) = array1(:) + array2(:) array1(:, :) = 1 array2(:, :) = array1(:, :) * scalar 其他 必要时,利用括号增加代码的可读性,如: ! better readability a = (b * i) + (c / n) ! poor readability a = b * i + c / n ...
a "kernel loop" that uses aligned memory accesses for this array operates on the aligned data. Following the peel loop and kernel loop, a remainder loop operates on any remaining unaligned data at the end of the array(s) from where the kernel loop left off until all iterations are fin...
缺省值为 -xprefetch_auto_type=no%indirect_array_access。 要求-xprefetch=auto 以及优化级别 -xO3 或更高级别。 诸如-xdepend 之类的选项可以影响计算间接预取候选项的主动性,进而影响由于更好的内存别名歧义消除信息而发生的自动间接预取插入的主动性。 3.4.165 -xprefetch_level={ 1|2|3} 控制预取指令的...