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fscanf problem and get invalid file identifier

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vaya putra
vaya putra 2022-9-6
回答： Walter Roberson 2022-9-6
base on handbook i write the fucntion as below.
but i am confuse why i got error
Error using fscanf
Invalid file identifier. Use fopen to generate a valid file identifier.
function [npoin,nelem,nvfix,ntype,nnode,ndofn,ndime,ngaus, ...
nstre,nmats,nprop,lnods, matno,coord,props,nofix, ...
iffix,fixed]=input_fem_elast();
format long;
global in;
global out;
%--- read the Control data:
npoin=fscanf(in,'%d',1);

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采纳的回答

Walter Roberson
Walter Roberson 2022-9-6
  • possibly the fopen() failed
  • possibly the fopen worked but you did not assign it to a variable named in
  • possibly the fopen worked and you assigned to in but in was not declared global in the place it was assigned to

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