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I want to read file if the following pattern.


Here is file1.text
Abc,192.168.99.4
Eyo,192.168.8.16,3370
Opa,4447
Ctc,192.168.66.2,5507



Here is my code that is working for single , . Var3 is not displaying any value.I am putting or operation between two and three values regular expresion.


 if(EOF == fscanf(mf," %[^,],%s,%s | %[^,], %[^,] %[^,],%s,%s,%s", var1,var2,var3)){
   printf("var2=%s\n",var2);
   printf(" var1=%s\n",var1);
   printf(" var3=%s\n",var3);
}


The code is producing output
Var2=Abc

Var1=192.168.99.4

Var3=

Var2=Eyo

Var1=192.168.8.16,3370

Var3=

Var2=Opa

Var1=4447

Var3=

Var2=Ctc

Var1=192.168.66.2,5507

Var3=


What I have tried:

How to split into two comma separated into 3 values ?
Posted
Updated 25-Dec-22 23:40pm

1 solution

fscanf[^] doesn't support regular expre3ssions - it supports character classes which are a much, much more limited form.
These character classes do not include an OR operator.

Remember that C predates Regular Expressions by several decades: you will need to process the lines yourself, there is no way to automate it as you want unless you explicitly add a later regex library and process lines that way once read from the file. Google will help you find some for your environment, but I've never tried to use one so I can't recommend anything specific.
 
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Comments
Member 8840306 26-Dec-22 5:46am    
I my code is in C not C++ . I am bound to use file data type .you can see this link quora.com/Can-I-use-fstream-in-C
Member 8840306 26-Dec-22 5:46am    
My question is simple how to read above text file in c using file datatype.??

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