Https://ide.codingblocks.com/s/258980

#1

whats wrong in my code !
plzz comment it out

#2

push ch instead of i

#3

still its giving wrong output after chnaging it

#4

actually the logic is not correct

for input (a+b+c) it will print duplicate
which is not correct
what you are doing insertin only openning braces
so in this case first you push ( and then when you got )
you return true
which gives wrong output

correct logic:
We iterate through the given expression and for each character in the expression, if the character is a open parenthesis ‘(‘ or any of the operators or operands, we push it to the stack. If the character is close parenthesis ‘)’, then pop characters from the stack till matching open parenthesis ‘(‘ is found.
Now for redundancy two condition will arise while popping-

  1. If immediate pop hits a open parenthesis ‘(‘, then we have found a duplicate parenthesis. For example, (((a+b))+c) has duplicate brackets around a+b . When we reach second “)” after a+b, we have “ (( ” in the stack. Since the top of stack is a opening bracket, we conclude that there are duplicate brackets.
  2. If immediate pop doesn’t hit any operand(‘*’, ‘+’, ‘/’, ‘-‘) then it indicates the presence of unwanted brackets surrounded by expression. For instance, (a)+b contain unwanted () around a thus it is redundant.
#5

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#6

https://ide.codingblocks.com/s/277303 pleasew check it again its giving error and not right ouptput am unable to do it

#7

I have corrected the syntax errors. Still your output is not correct. Very your approach from above.
You can refer this code

#8

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