Infix-to-postfix - This is a parser, implemented with C, Flex and Bison, that parses infix mathematical expressions and convetrs them to postfix. After each successful convertion, it calculates the result of the postfix expression. I am new to lex and yacc programs.I have been trying to write a yacc program which takes as. Lex and yacc program to convert infix to. Into postfix-1. Program: This Program. Solid Edge St 5 Cracked. Algorithm for Infix to Postfix Conversion. C Program to Convert Infix Expression to Postfix Using Stack.

In C, strings do not magically expand like they do in other languages. (Or, better said, there really is no string object.) You cannot call strcat(a, b) unless you have already ensured that the char array a has enough space following the NUL terminator to append b. You can't strcat to a string literal, because not only is there not enough space, but also the string literal may be in read-only memory. And you can't strcpy to an unassigned variable and expect sufficient memory to be allocated automatically. (Although $$ is not actually an uninitialised variable, since it is initialised to the value of $1.) So your code is full of buffer overruns, which is undefined behaviour.