i am facing a problem in fortran 77 coding......my problem is as follow

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suppose we have four functions.....f1(a,b,c),f2(a,b,p), f3(a,b,d), f4(a,b,d)......i integrated f1 and f2 with respect to c and p respectively and left with f1(a,b) and f2(a,b),,,now i have another function f5(a,b,d) = f3(a,b,d)*integration of function f1 with respect to c (i.e. f1(a,b)) + integration of function f2 with respect to p (i.e. f2(a,b)) and i integrated it with respect to 'a'............and another function f6(a,b,d)= f4(a,b,d)+ integration of f1 with respect to c(i.e. f1(a,b)) and also i integrated it with respect to 'a'.....now the problem is f6 is giving correct answer but f5 doesnot.....and even i have to use integration of f5 and f6 in another function and integrate with respect to 'b'.....but f5 is not getting solved....anyone knows how to integrate a function containing integration of another function having same variables?...please help....

Posted 10-Jan-15 2:09am

Member 11365216

Updated 10-Jan-15 2:32am

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Amarnath S · Answer 1 · 2015-01-10T03:22:00

If I understand the issue right, you have

f1Int(a, b) = integral of f1(a, b, c) with respect to c
f2Int(a, b) = integral of f2(a, b, p) with respect to p

f12Int(a, b) = f1Int(a, b) + f2Int(a, b)
Now, f5(a, b, d) = f3(a, b, d) * f12Int(a, b)

Similarly, f6(a, b, d) = f4(a, b, d) + f1Int(a, b)
The operation for f5 is a *, whereas that for f6 is a +

Is this understanding correct? If so, it should work.

If I remember right, in Fortran 77, two functions with different prototypes should not preferably have the same name - preferable not to have f1(a, b, c) and f1(a, b); you need to name the second one differently, say, f1Int(a, b). Just want to ensure that your program does not have such identical function names.