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2010-06-01T04:57:56Z

1 версия

в 17:44, 31 мая 2010

2010-05-31T17:44:27Z

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== Increment and Decrement: Demonstrate ++. ==



<source lang="java">
public class MainClass {
public static void main(String args[]) {
int a = 1;
int b = 2;
int c;
int d;
c = ++b;
d = a++;
c++;
System.out.println("a = " + a);
System.out.println("b = " + b);
System.out.println("c = " + c);
System.out.println("d = " + d);
}
}</source>



<pre class=codeResult>a = 2
b = 3
c = 4
d = 1</pre>

== The increment and decrement operators ==

<OL><LI>add an integer variable by one.</LI><LI>increment operator: two successive plus signs, ++.</LI><LI>decrement operator: --.</LI></OL>



<source lang="java">
public class MainClass {
public static void main(String[] argv) {
int count = 10;
++count; // Add 1 to count
--count; // Subtract 1 from count

System.out.println(count);
}
}</source>



<pre class=codeResult>10</pre>

== The prefix form and the postfix form ==



<source lang="java">
public class MainClass {
public static void main(String[] args) {
int numA = 5;
int numB = 10;
int numC = 0;
numC = ++numA + numB;
System.out.println(numA);
System.out.println(numC);
}
}</source>



<pre class=codeResult>4
14</pre>

== Using ++ and -- with floating-point variables ==



<source lang="java">
public class MainClass{
public static void main(String[] arg){
double a = 12.12;

System.out.println( a-- );
System.out.println( a++ );
System.out.println( --a );
System.out.println( ++a );
}
}</source>



<pre class=codeResult>12.12
11.12
11.12
12.12</pre>

== Using the increment and decrement operators in an expression ==



<source lang="java">
public class MainClass {
public static void main(String[] args) {
int numA = 5;
int numB = 10;
int numC = 0;
numC = ++numA + numB;

System.out.println(numA);
System.out.println(numC);
}
}</source>



<pre class=codeResult>6
16</pre>

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Admin: 1 версия

в 17:44, 31 мая 2010