Question

how can i solve 43+1-4*2 with post fix notation? ive tried a lot to solve this thing, but i cant :/

at the end i get: 43,1,4,2 +*- then =174 ..

Answer 1

when we see the priority order of the operators
*>- and + while - and + have the same priority. in that case we perform the operations left to right.
43+1-4*2
according to the priority order we will first do 4*2. writing this in postfix gives us
42*
next we will do 43+1. writing ths in postfix gives
431+ and finally (431+)-(42*) . writing this in postfix gives us
431+42*- and the final answer is
44-8=36. Does that help?