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out传值
class Program
{
public void jia(int a, int b)
{
a = a + b;
Console.WriteLine(a);
}
}
static void Main(string[] args)
{
Console.Write("请输入a=");
int a = int.Parse(Console.ReadLine());
Console.Write("请输入b=");
int b = int.Parse(Console.ReadLine());
Program hanshu = new Program();
// hanshu.jia(a,b);
//形参 传值
//只是将值给它,并不是把变量名(箱子)也给它
Console.WriteLine(a);//这个a跟函数里的a是不一样的
Console.ReadLine();
}
class Program
{
public void jia1(int a,out int b)
{
b = a + 5;
}
}
static void Main(string[] args)
{
Console.Write("请输入a=");
int a = int.Parse(Console.ReadLine());
Console.Write("请输入b=");
int b = int.Parse(Console.ReadLine());
Program hanshu = new Program();
hanshu.jia1(a,out b);
Console.WriteLine(b);
//out传值时,仅仅是将变量名称(箱子)传给函数
//在进行完成循环体之后,将这个变量以及里面的值一起拿出来
//实参 传址
//将变量名(箱子)给它
Console.ReadLine();
}
列题:
class Program { public void hou() { int sum = 0; for (int i = 10; i > 0; i--) { if (i == 10) { sum = 1; } else { sum = (sum + 1) * 2; } } Console.Write(sum); } public int jiafen(int a) { a+= 10; return a; } public void jiafen2(int[] a) { int l= a.Length; for (int i = 0; i < l; i++) { a[i] += 10; } } public int [] jiafen4(int[] a) { int l = a.Length; for (int i = 0; i < l; i++) { a[i] += 10; } return a; } public void jiafen3(int[] a, out int[] b) { int l = a.Length; for (int i = 0; i < l; i++) { a [i] = a[i] + 10; } b = a; } static void Main(string[] args) { //out 传值 形式参数:只给值,不给变量名(传值) 实际参数:将变量名传给函数(传址) //out是实参 Program hanshu=new Program(); //猴子 //hanshu.hou(); //Console.ReadLine(); //输入班级人数,根据人数输入每个人的成绩 //本班都是少数民族学生,每个人+10分 //写一个专门+10分的函数,参数是这个分数的数组 Console.WriteLine("请输入班级的人数"); int renshu = int.Parse(Console.ReadLine()); int[] fen = new int[renshu]; for (int i = 0; i < renshu ;i++ ) { Console.WriteLine("请输入第{0}名同学的成绩",(i+1)); fen[i] = int.Parse(Console.ReadLine()); } //for(int i=0;i <renshu ;i++) //{ // fen[i ]= hanshu.jiafen(fen[i]); //} //hanshu.jiafen2(fen ); //hanshu.jiafen3(fen,out chengji); int []chengji=new int [renshu ]; hanshu.jiafen3(fen,out chengji ); foreach(int aa in chengji ) { Console.WriteLine(aa ); } foreach (int aa in fen ) { Console.WriteLine(aa); } Console.ReadLine(); } } }
out传值