Please help me with this code

Code Help C
1 
#include <stdio.h>
#include <stdlib.h>

struct stack {
  int size;
  int top; 
  char *arr;
};

int isfull(struct stack *ptr) {
  return ptr->top == ptr->size - 1;
}

int isempty(struct stack *ptr) {
  return ptr->top == -1;
}   

void push(struct stack *ptr, char val) {
  if (isfull(ptr)) {
    printf("Stack is full\n");
  } else {
    ptr->top++;
    ptr->arr[ptr->top] = val;
  }
}

char pop(struct stack *ptr) {
  if (isempty(ptr)) {
    printf("Stack is empty\n");
    return '\0'; // Return a default value or handle it appropriately in your context
  } else {
    char val = ptr->arr[ptr->top];
    ptr->top--;
    return val;
  }
}

int para(char *exp) {
  struct stack *sp = (struct stack *)malloc(sizeof(struct stack));
  sp->size = 10;
  sp->top = -1;
  sp->arr = (char *)malloc(sp->size * sizeof(char));

  for (int i = 0; exp[i] != '\0'; i++) {
    if (exp[i] == '(') {
      push(sp, '(');
    } else if (exp[i] == ')') {
      if (isempty(sp)) {
        return 0;
      } else {
        pop(sp);
      }
    }
  }

  if (isempty(sp)) {
    return 1;
  } else {
    return 0;
  }
}

int main() {
  char *exp = "7(7+)";
  
  if (para(exp)) {
    printf("Parenthesis matching\n");
  } else {
    printf("Parenthesis is not matching\n");
  }

  return 0;
}

why this code is not working on replit

2

Hey @MaharshiAnnepu welcome to the forums!

Are you getting any errors when you run your code?