猜数字小游戏（仅限小朋友哦）

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代码：

int temp;//定义一个随机变量(是一个全局变量)

        private void Form1_Load(object sender, EventArgs e)
        {
            pictureBox1.Visible = false;
            Random random1 = new Random();
            temp = random1.Next(1 , 100);
        }

        private void button1_Click(object sender, EventArgs e)
        {
                int num;
                num = int.Parse(textBox1.Text);
                    if (num < temp)
                    {
                        label3.Text = "您输入的数太小！";
                        textBox1.Focus();
                    }
                    else if (num > temp)
                    {
                        label3.Text = "您输入的数字太大！";
                        textBox1.Focus();

                    }
                    else
                    {
                        label3.Text = "恭喜您，答对了！";
                        pictureBox1.Visible = true;
                    }






        }

        private void button2_Click(object sender, EventArgs e)
        {
            pictureBox1.Visible = false;
            textBox1.Clear();
            textBox1.Focus();
            label3.Text = "欢迎小朋友来到猜数字游戏";
            Random random1 = new Random();
            temp = random1.Next(1, 100);

}

        private void button3_Click(object sender, EventArgs e)
        {
            textBox1.Text = temp.ToString();
        }