Best Answer

You convert an (infix) expression into a postfix expression as part of the process of generating code to evaluate that expression.

Study guides

☆

Q: Why you need convert a expression into postfix expression?

Write your answer...

Submit

Still have questions?

Continue Learning about Math & Arithmetic

By itself you cannot. You need to have a set of values for the variables and the expression which you need to solve.

The idea is to get a simpler expression. If you need to build the hardware to implement a specific boolean expression, you can actually save money if the expression is simpler - and thus, you need less components.

Simply put, an expression does not need an equal sign, while an equation does. Equation: x+y=z Expression: x+y

Expression: x+10+5x Solve: x+5x=6x Answer: 6x+10

It may need an answer but only equations include an equality sign

Related questions

Write and explain a 'C' function to convert the given infix expression to postfix expressionWrite and explain a 'C' function to convert the given infix expression to postfix expression

it is needed in compiler designing

convert postfix notation to infix notation in c?

No

convert to perfixed to postfixed

Yes, you should.

An algorithm can not be written with the following infix expression without knowing what the expression is. Once this information is included a person will be able to know how to write the algorithm.

people almost exclusively use infix notation to write mathematical expressions, computer languages almost exclusively allow programmers to use infix notation. However, if a compiler allowed infix expressions into the binary code used in the compiled version of a program, the resulting code would be larger than needed and very inefficient. Because of this, compilers convert infix expressions into postfix notation expressions, which have a much simpler set of rules for expression evaluation. Postfix notation gets its name from the fact that operators in a postfix expression follow the operands that they specify an operation on. Here are some examples of equivalent infix and postfix expressions Infix Notation Postfix Notation 2 + 3 2 3 + 2 + 3 * 6 3 6 * 2 + (2 + 3) * 6 2 3 + 6 * A / (B * C) + D * E - A - C A B C * / D E * + A C * - Where as infix notation expressions need a long list or rules for evaluation, postfix expressions need very few.

a+v+l

You can convert from postfix to infix through the use of stacks. Consider the following expression conversion:54+67*+ -> ((5+4)+(6*7))The way this can be achieved is that whenever you encounter an operator, pop the last two expressions and join them using the operator. Remember to include the open braces before the first expression and a close braces after the second expression. Check the given link below for the program:

(a + b) * c / ((x - y) * z)

The only postfix/prefix operators in C++ are the increment and decrement operators. Converting from one to the other is simply a matter of moving the operator before (prefix) or after (postfix) the operand.int x = 1;++x; // prefix (increments x and returns the new value of x)x++; // postfix (increments x but returns the original value of x)--x; // prefix (decrements x and returns the new value of x)x--; // postfix (decrements x but returns the original value of x)The prefix operators are functionally equivalent to:// prefix incrementint result = ( x = x + 1 );// prefix decrementint result = ( x = x - 1 );The postfix operators are functionally equivalent to:// postfix incrementint result = x;x = x + 1;// postfix decrementint result = x;x = x - 1;

People also asked

Featured Questions