so after scanning in the first time, it scans in a second times

I m not getting it,.

What do you expect scanf to do?

1) Don't use compile time arrays, they will fill your heap space up. 2) don't read a full line at once, because it will make you do the parsing twice 3) You can do the parsing recursively because you know that if there is something after the second operand, you have a second equation. do something like this: a + b if after b, you have another operation, you evaluate a + (b + c) for example that way, you don't even have to store the numbers, meaning that you will be less likely to fuck up and you won't even have to use the std::vecto

how to parse recursively🙄

Get the input ..but it gets till a white space .... For that other things like gets is used...

what does it fill into the array?

In second case what does happen???

yea

Yeah...so how "have \0kers got into it...

yea, we do

we have that string in the array

I'll show you 😉

its because the array wasnt emptied after filling it

🙄

oh okie

oh okie

if it was built with rvo then it’s okay ¯\_(ツ)_/¯

rvo?

also notice that it expects the expressio to be terminated by "<space>;"

return value optimization

its a chain of function calling each other i loved this approach 😍

Hey guys my problem is something different which I really want to discuss with you guys,it may not be very big problem for you but I really need help: Problem:I learn new things everyday related to C and C++ and in general we all know that our brain can't remember each and every new thing we learn everyday ,So as I learn new things I don't get much time to make notes of each and every new thing I learn ,and by the period of time I start forgetting new things I learnt in my life which could be very important to solve a real life problem and I have to go through each and everything again. I want some help regarding this problem from those who are able to cope up with these things thanks in advance.

I've been programming for 10 years and I still constantly need to look up library documentation and sometimes even language syntax. Once I look up something, I do usually remember it until I finish the project that I'm working on, at which point I often forget it again. :P There are a few snippets of code that I have almost in my muscle memory, but that's because I wrote those same pieces of code so many times, that my brain simply remembered them. What matters though (in my opinion at least) is to remember what you need, how fast you are able to find it, and to remember where to look for it.

hey maxi why u used std::string exp;?

Welcome! 0) You should forget html/css

Welcome! 0) You should forget html/css