新手求解
namespace 类的应用_猫_
{
class Class1
{
public int weight;
public string color;
public int age;
public void Input()
{
Console.Write("请输入猫的体重：");
this.weight = Convert.ToInt32(Console.ReadLine());
Console.WriteLine();
Console.Write("请输入猫的颜色：");
this.color = Console.ReadLine();
Console.WriteLine();
Console.Write("请输入猫的年龄：");
this.age = Convert.ToInt32(Console.ReadLine());

}
public void Output()
{
Console.WriteLine("猫的体重为:",this.weight);
Console.WriteLine("猫的颜色为：",this.color);
Console.WriteLine("猫的年龄为:",this.age);
}
public void Modify()
{
Console.WriteLine("信息修改中...");
Console.Write("体重");
this.weight = Convert.ToInt32(Console.ReadLine());
Console.Write("颜色：");
this.color = Console.ReadLine();
Console.Write("年龄:");
this.age =Convert.ToInt32(Console.ReadLine());
}
}
}
namespace 类的应用_猫_
{
class Program
{
static void Main(string[] args)
{
Class1 a = new Class1();
a.Input();
a.Output();
a.Modify();
Console.ReadLine();
}
}
}
为什么不能运行呢？

[解决办法]

C# code

        public void Output()        {            Console.WriteLine("猫的体重为: {0}", weight);            Console.WriteLine("猫的颜色为：{0}", color);            Console.WriteLine("猫的年龄为:{0}", age);        }
[解决办法]
,  改为  +
Console.WriteLine("猫的体重为: "+this.weight);
[解决办法]
C# code
        Console.WriteLine("猫的体重为: " + weight);            Console.WriteLine("猫的颜色为：" + color);            Console.WriteLine("猫的年龄为:" + age);