Question: I need help with this code, the first 2 steps work in main but the 3 rd step ( Evaluate ) leads to the program

I need help with this code, the first 2 steps work in main but the 3rd step(Evaluate) leads to the program resulting in this "bash: line 1: 8 Segmentation fault (core dumped) bash -c 'g++-o jdoodle *.cpp && ./jdoodle mainnull' ." This is the code:
#include
#include
#include
#include
#include
using namespace std;
// Function to check if parentheses in the expression are balanced
bool isValidParentheses(const string& expr){
stack s;
for (char ch : expr){
if (ch =='('){
s.push(ch); // Push opening parenthesis
} else if (ch ==')'){
if (s.empty()|| s.top()!='('){
return false; // Mismatched parentheses
}
s.pop(); // Match closing parenthesis
}
}
return s.empty(); // Return true if all parentheses matched
}
// Function to determine the precedence of operators
int precedence(char op){
if (op =='+'|| op =='-') return 1;
if (op =='*'|| op =='/') return 2;
return 0; // Parentheses or invalid operator
}
// Function to convert an infix expression to postfix
string infixToPostfix(const string& expr){
stack s;
string result;
for (char ch : expr){
if (isdigit(ch)){
result += ch; // Append operand to result
} else if (ch =='('){
s.push(ch); // Push '(' onto stack
} else if (ch ==')'){
while (!s.empty() && s.top()!='('){
result += s.top();
s.pop(); // Append operators until '(' is found
}
s.pop(); // Remove '('
} else {
while (!s.empty() && precedence(s.top())>= precedence(ch)){
result += s.top(); // Pop operators with higher precedence
s.pop();
}
s.push(ch); // Push current operator
}
}
// Append remaining operators in stack
while (!s.empty()){
result += s.top();
s.pop();
}
return result;
}
// Function to evaluate a postfix expression
int evaluatePostfix(const string& expr){
stack s;
for (char ch : expr){
if (isdigit(ch)){
s.push(ch -'0'); // Convert character to integer and push
} else {
int val2= s.top(); s.pop();
int val1= s.top(); s.pop();
switch (ch){
case '+': s.push(val1+ val2); break;
case '-': s.push(val1- val2); break;
case '*': s.push(val1* val2); break;
case '/': s.push(val1/ val2); break;
}
}
}
return s.top(); // The result is the final value on the stack
}
int main(){
std::string expression ="(5+3)*8+2";
// Step 1: Validate parentheses
if (!isValidParentheses(expression)){
std::cout << "Invalid parentheses!" << std::endl;
return 0; // If parentheses are invalid, exit the program
}
// Step 2: Convert infix to postfix
std::string postfix = infixToPostfix(expression);
std::cout << "Postfix Expression: "<< postfix << std::endl; // Print the postfix expression
// Step 3: Evaluate postfix expression
int result = evaluatePostfix(postfix); // Evaluate the postfix expression
std::cout << "Result: "<< result << std::endl; // Output the evaluation result
return 0;
}

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer
Step: 1 Unlock blur-text-image
Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock
Step: 3 Unlock

Students Have Also Explored These Related Programming Questions!

Q:

someone answered the A1, B1, i need the other remaining parts from 3 to 5 3 of 5 sem, store each in a point variable and print them all. Again, this main() is also for unit testing. B. establish the...

Q:

Java code needed. Really need help with code. dont worry about the steps part but everything else is needed. Here is a example of what it should produce. Need this by 4 today if anyone can help. Do...

Q:

Your mission in this assignment is to write a simple text-based adventure game in the tradition of Will Crowthers pioneering Adventure program of the early 1970s. In games of this sort, the player...

Q:

Let's Redefine "Productivity" for the Hybrid Era Harvard Business Review. by Jaime Teevan. September 09, 2021 Summary Study after study has shown that it's not enough to be guided by simple measures...

Q:

Find attached Ingredients: Water, MCC, Salt, Nicotine, pH regulator, sweeteners and flavours I am wondering why the decision to go with LYFT. I understand migrating to LYFT would be easier from sells...

Q:

1. - Expain the motivations of Unilever in acquiring Inmarko. - Identify the risks Unilever faces in using acquisition as a mode for growth, as opposed to other modes discussed in the chapter. 2....

Q:

1. - Expain the motivations of Unilever in acquiring Inmarko. - Identify the risks Unilever faces in using acquisition as a mode for growth, as opposed to other modes discussed in the chapter. 2....

Q:

Performance Appraisal: Measurement, Assessment, and Management Chapter 7 Radius Images/Getty Images Learning Objectives After reading this chapter, you should be able to do the following: Use a...

Q:

Dickens, Kristen, is enrolled as a doctoral student in the Counselor Education at the University of New Orleans. She is a registered counselor intern in the state of Louisiana and works at a...

Q:

c++ In Part A, you will expand your search module to sort an array of strings and search the sorted array more efficiently. By the end of Part A, your search module will have functions with the...

Q:

A bank in Singapore has offered a mortgage loan to a local logistics company to allow them to purchase a new warehouse. The bank is willing to provide them with a 10-year loan of $600,000 at an...

Q:

Let T: P2 P3 be the transformation that maps a polynomial p(f) into the polynomial (t + 3)p(f). a. Find the image of p(f) = 3 - 2t C t2. b. Show that T is a linear transformation. c. Find the matrix...

Q:

Other data:1. Prepaid insurance is a 1-year policy starting May 1, 2025.2. A count of supplies shows ?750 of unused supplies on May 31.3. Annual depreciation is ?3,600 on the buildings and ?1,500 on...

Q:

Horchata 56 Jamaica Carne Al Asada Pastor Totals 0 Tamarindo 7 63 9 6 33 48 Lengua Totals 8 29 12 49 73 35 52 160 The table above lists the preference of tacos and drink combinations for people What...