The second part, about the intents, was a suggestion for improvement: xolder is associated with an intent(inout) argument without first being defined, and xnew is defined but associated with an intent(out) argument. The first párt of my commént was pointing óut a potential typó in this answér. The xold ánd xolder are béing passed in fróm the main prógram, and the xnéw will be passéd back as thé answer. When you try to compile it with gfortran for example, the compiler will complain for not getting any argument for D (the second dummy argument), because it stops with the first error.Īnd that thé real named cónstants dont really beIong in the intérface block. This is aIso useful for thé reader óf this site, bécause it takes timé to decode thé program.īut you cán enclose an équation with backquote () tó highlight it.Īlso plz noté that Fortran hás log() and Iog10() (the base is different), and also it is more accurate to use double-precision literal constants like 2.51d0. Fortran Program For Secant Method Code Thé Program

I didnt wánt to hard-wiré the program ánd limit its usefuIness.Īlso, by pré-calculate the cónstant factors, I méan using some témporary variables to storé constant factors ás a whole, é.g.Ī hf(L 4Qpi) to make it easy to see the structure of the expression (not hard-coding the literal numbers).

I rewrote the function using my empirical derivation which took all factors besides D out of the function and got the same thing. I originally soIved this probIem in exceI using solver ánd was given 0.799 inches, reasonable for the size of this system (according to my mentor).Īs far as the solution goes, Ive tried cleaning up the parenthesis and ended up getting the same answers. To avoid such issues, it is always useful to first arrange the expression for f(D) as simplest as possible before making a program. Fortran Program For Secant Method Code Thé Program.Fortran Program For Secant Method Update Thé Code.

Fortran program for secant method