Lab
Bhai tension mat le 😎 Main tujhe Lab-3 ka pura ready-to-write material de raha hoon — tu bas copy karega, samjhega aur practical me likh dega. Main sab programs simple C, array-based stack/queue, singly linked list me de raha hoon. --- 🔥 1️⃣ Evaluate Postfix Expression Using Stack #include <stdio.h> #include <ctype.h> int stack[100], top = -1; void push(int x) { stack[++top] = x; } int pop() { return stack[top--]; } int main() { char exp[100]; int i, a, b; printf("Enter postfix expression: "); scanf("%s", exp); for(i = 0; exp[i] != '\0'; i++) { if(isdigit(exp[i])) { push(exp[i] - '0'); } else { b = pop(); a = pop(); switch(...