Stack Calculator

Medium Stack: Applications PRO

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Problem Statement

Write a C program to evaluate simple arithmetic expressions containing numbers and operators using a stack calculator.

Input Format

A valid postfix expression string.

Output Format

Print the final calculation result.

Constraints

Valid expression with integer operations

Sample Input

53+2*

Sample Output

Explanation

Evaluate expression operands and operators sequentially using stack push and pop mechanics.

Starter Code

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main() {
    char expr[100];
    if (scanf("%s", expr) == 1) {
        // Write your code here for stack calculator evaluation
    }
    return 0;
}

Limits

Time Limit: 1s
Memory Limit: 256MB

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