[汇编]C 常用控制语句大全.doc
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C# 常用控制语句大全
语句示例
语句列表和块语句
static void Main() {
F();
G();
{
H();
I();
}
}
标记语句和 goto 语句
static void Main(string[] args) {
if (args.Length == 0)
goto done;
Console.WriteLine(args.Length);
done:
Console.WriteLine(Done);
}
局部常数声明
static void Main() {
const float pi = 3.14f;
const int r = 123;
Console.WriteLine(pi * r * r);
}
局部变量声明
static void Main() {
int a;
int b = 2, c = 3;
a = 1;
Console.WriteLine(a + b + c);
}
表达式语句
static int F(int a, int b) {
return a + b;
}
static void Main() {
F(1, 2); // Expression statement
}
if 语句
static void Main(string[] args) {
if (args.Length == 0)
Console.WriteLine(No args);
else
Console.WriteLine(Args);
}
switch 语句
static void Main(string[] args) {
switch (args.Length) {
case 0:
Console.WriteLine(No args);
break;
case 1:
Console.WriteLine(One arg );
break;
default:
int n = args.Length;
Console.WriteLine({0} args, n);
break;
}
}
while 语句
static void Main(string[] args) {
int i = 0;
while (i args.Length) {
Console.WriteLine(args[i]);
i++;
}
}
do 语句
static void Main() {
string s;
do { s = Console.ReadLine(); }
while (s != Exit);
}
for 语句
static void Main(string[] args) {
for (int i = 0; i args.Length; i++)
Console.WriteLine(args[i]);
}
foreach 语句
static void Main(string[] args) {
foreach (string s in args)
Console.WriteLine(s);
}
break 语句
static void Main(string[] args) {
int i = 0;
while (true) {
if (i == args.Length)
break;
Console.WriteLine(args[i++]);
}
}
continue 语句
static void Main(string[] args) {
int i = 0;
while (true) {
Console.WriteLine(args[i++]);
if (i args.Length)
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