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I developed an application using lex & yacc. It is a simple calculator which does add, subtract and multiplication. The program is compiled correctly without errors. But when i execute the program, it is giving 0 as output irrespective of input and the result is always 0.000. For example if the input is 3.2 + 4.5, the output is 0.000. I dont know where i have gone wrong. The programs are given below.
I would recommend printing out all the arguments to make sure you are parsing them as you intended it too. It has been a long time since I have used lex and yacc but I am guessing you are getting 0's for all your values with that code.
This should probably be moved to the programming forum....
Ok... so I decided to do some debugging for you because I was bored...
You are setting yyval correctly. You are also correctly determining which operation you are doing. However, $1 is always 0.0000 when your number case comes up so this is where your problem lies. I'll leave the rest to you.