section    .data
 
msg: db "The number of command line arguments is "
len	equ	$ - msg			;length of our dear string
char db 'character'
charlen db $ - char
;
    SECTION .bss
cline:resb 81    ;space to hold command line arguments for output for argc
result:resb 20    ;space to hold command line arguments for output for argv[0]
;
 
section	.text
    global main         ;must be declared for using gcc
;
main:	                ;tell linker entry point
  ;  
  mov ecx,0          ;count output characters
  pop eax            ;reject this 32 bits
  pop eax    :        ;get argc
  add al, 30H        ;convert integer to ascii
  mov edi, cline     ;put char in output buffer cline
  mov byte[edi],al   ;move argc into edi memory address
 inc ecx            ;increment char count
 inc edi            ;increment pointer to o/p buffer 
 mov al, 0aH        ;LF to end line
 mov byte[edi],al   ;put it at end of output line
 inc ecx            ;increment output char count
 
 pop eax            ;get argv[0]
 cmp eax,0
 jz message
 add eax,0
 add al, 30H       ;convert integer to ascii
 mov edi, result    ;put char in output buffer result
 mov byte[edi],al   ;move argv[0] into edi memory address
 inc ecx            ;increment output char count
 inc edi            ;increment pointer to o/p buffer
 
 message:
 mov edx,len        ;length of string to write
 mov ecx,msg        ;addr of string
 mov ebx, 1         ;file descriptor 1 = stdout
 mov eax, 4         ;"write" system call
 int 0x80           ;call the kernel
 ;
 
 pop edx            ;restore char count into edx for system call
 mov ecx,cline      ;address of string
 mov ebx, 1         ;file descriptor 1=stdout
 mov eax, 4         ;"write" system call
 int 0x80           ;call the kernel
 
 ;
 mov edx,charlen    ;length of string to write
 mov ecx,char       ;addr of string
 mov ebx, 1         ;file descriptor 1 = stdout
 mov eax, 4         ;"write" system call
 int 0x80           ;call the kernel
 ;
 pop edx            ;restore char count into edx for system call
 mov ecx,result      ;address of string
 mov ebx, 1         ;file descriptor 1=stdout
 mov eax, 4         ;"write" system call
 int 0x80           ;call the kernel
 ;
 
 mov ebx, 0         ;exit with error code 0
 mov eax, 1         ;"exit" system call
 int 0x80           ;call the kernel

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import React, { useState } from "react";

export default function Calculator() {
  const [num1, setNum1] = useState("");
  const [num2, setNum2] = useState("");
  const [result, setResult] = useState(null);

  const calculate = (operator) => {
    const n1 = parseFloat(num1);
    const n2 = parseFloat(num2);
    if (isNaN(n1) || isNaN(n2)) {
      setResult("Invalid Input");
      return;
    }

    let res;
    switch (operator) {
      case "+":
        res = n1 + n2;
        break;
      case "-":
        res = n1 - n2;
        break;
      case "*":
        res = n1 * n2;
        break;
      case "/":
        res = n2 !== 0 ? n1 / n2 : "Cannot divide by zero";
        break;
      default:
        res = "Error";
    }
    setResult(res);
  };

  return (
    <div className="p-6 bg-gray-100 rounded-xl shadow-lg max-w-sm mx-auto">
      <h2 className="text-xl font-bold text-center mb-4">Simple Calculator</h2>
      <input
        type="number"
        placeholder="Num1"
        value={num1}
        onChange={(e) => setNum1(e.target.value)}
        className="w-full p-2 border rounded mb-2"
      />
      <input
        type="number"
        placeholder="Num2"
        value={num2}
        onChange={(e) => setNum2(e.target.value)}
        className="w-full p-2 border rounded mb-2"
      />
      <div className="flex justify-between">
        <button onClick={() => calculate("+")} className="px-4 py-2 bg-blue-500 text-white rounded">+</button>
        <button onClick={() => calculate("-")} className="px-4 py-2 bg-red-500 text-white rounded">-</button>
        <button onClick={() => calculate("*")} className="px-4 py-2 bg-green-500 text-white rounded">×</button>
        <button onClick={() => calculate("/")} className="px-4 py-2 bg-yellow-500 text-white rounded">÷</button>
      </div>
      <h3 className="mt-4 text-lg font-semibold text-center">Result: {result}</h3>
    </div>
  );
}