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Warren · Guest

I am trying to replace some variables with their values

IE

int x1=1,x10=2,x11=3,y7=4,y77=5;

if the string I want to replace the vars is as follows

cos(x11*x10*x1)/tan(y77-y7)

then I would like the string to look as the next line

cos(1*2*3)/(5-4);

what I receive is as follows

cos(11*10*1)/(4-4);

Presently I am using the pos(?) which is not effective so I am wondering
what is the most intelligent way of doing this? I do not mind writing the
code but I don't really want to re-invent the wheel if I don't have to.

Does anyone know of a function that will look for each occurrence of a
substring in a string? That failing is the most effect way to replace the
var name with the var value? There could be X number of var names and each
var name could be in the string X times. I will loop though the string to
complete this but do not know if there are smarter ideas?

Thanks

Warren

Warren · Guest

I am trying to replace some variables with their values

IE

int x1=1,x10=2,x11=3,y7=4,y77=5;

if the string I want to replace the vars is as follows

cos(x11*x10*x1)/tan(y77-y7)

then I would like the string to look as the next line

cos(1*2*3)/(5-4);

what I receive is as follows

cos(11*10*1)/(4-4);

The reason being the search finds the first x1 and replaces that. The first
x1 is really an x11 so the x1 is replaced by the following 1 remains. My x11
is not replaced correctly. Also I do not have authority to demand the var
names start at the highest I.E. x11 and work down to x1 which would be the
simplest solution to my problem.

Presently I am using the pos(?) which is not effective so I am wondering
what is the most intelligent way of doing this? I do not mind writing the
code but I don't really want to re-invent the wheel if I don't have to.

Does anyone know of a function that will look for each occurrence of a
substring in a string? That failing is the most effect way to replace the
var name with the var value? There could be X number of var names and each
var name could be in the string X times. I will loop though the string to
complete this but do not know if there are smarter ideas?

Thanks

Warren