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need help with file handling
Hi, It is not clear because of wrap(?) whether the date and time are always present on every line, or whether the time is at the end or the beginning of a line. Please would you clarify. -
Simultaneous equation
The array elements should be in a matrix, not a vector. The constants (right-hand sides) can remain in a vector. -
Fortran character set
In your list, ** is not a character. It is made up of two asterisks. I think that your arithmetic is incorrect, unless you are counting upper-case letters also. -
Matrix direct sum
That is not a "sum" of matrices. You need to define one large array that will accommodate all the elements that you want. Then for each little matrix, you write: x(1:m,1:n) = a where a is dimensioned as a(m,n) for the first little array, x(m+1:m+q, n+1:n+r) = b (where b is dimensioned as... -
How to save the original variable in a subroutine?
It seems to me that you wish to save the contents of a variable. To do that, just assign its value to another variable. The SAVE statement does something quite different. It causes tha values of a variable to be retained even though the procedure in which the SAVE statement exists terminates... -
counterpart of "dble" in real*16 data format
DBLE is intended to just that - convert the argument to double precision. To convert to quad precision, you use the fnction REAL with the KIND argument specified. -
problem handling big real numbers
The problem is that the integers that you have in your code have too many digits for most systems. The largest integers are typically 2147483647. To enter your number in the program, you need to write: 1329527587452d0 and 789000066068d0 and they then become double precision. The division can... -
getting weird error message on executing my program
This description is not much help without declarations and the relevant code. It sounds like you have a subscript error (if you are using arrays). -
Problem reading blank variables
You need to include all the declarations.
