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tonyh發表於 2014-9-20 15:02 | 只看該作者

printf() 函式

public class ch48
{
public static void main(String args[])
{
double a=3.456789;
double b=34.56789;
double c=345.6789;
double d=3456.789;
System.out.printf("%.3f%n",a); //%.3f 四捨五入至小數點後第三位
System.out.printf("%.2f%n",b); //%n 換行
System.out.printf("%.1f%n",c);
System.out.printf("%.0f%n",d);
System.out.printf("%9.2f%n",a); //數值的總長度為9個字元
System.out.printf("%9.2f%n",b);
System.out.printf("%9.2f%n",c);
System.out.printf("%9.2f%n",d);
}
}

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Rank: 1

2^#

張瀚仁發表於 2014-9-20 15:05 | 只看該作者

public class ch48
{
public static void main(String args[])
{
double a=4541.23456;
double b=454.123456;
double c=45.4123456;
double d=4.54123456;
System.out.printf("%.3f%n",a);
System.out.printf("%.3f%n",b);
System.out.printf("%.3f%n",c);
System.out.printf("%.3f%n",d);
System.out.printf("%7.2f%n",a);
System.out.printf("%7.2f%n",b);
System.out.printf("%7.2f%n",c);
System.out.printf("%7.2f%n",d);
}
}

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3^#

黃崇維發表於 2014-9-20 15:06 | 只看該作者

public class ch48
{
public static void main(String args[])
{
double a=3.456789;
double b=34.56789;
double c=345.6789;
double d=3456.789;
System.out.printf("%.3f%n",a); //%.3f 四捨五入至小數點後第三位
System.out.printf("%.2f%n",b); //%n 換行
System.out.printf("%.1f%n",c);
System.out.printf("%.0f%n",d);
System.out.printf("%9.2f%n",a); //數值的總長度為9個字元
System.out.printf("%9.2f%n",b);
System.out.printf("%9.2f%n",c);
System.out.printf("%9.2f%n",d);
}
}

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4^#

林以諾發表於 2014-9-20 15:06 | 只看該作者

public class ch48
{
public static void main(String args[])
{
double a=3.456789;
double a=34.56789;
double a=345.6789;
double a=3456.789;
System.out.printf("%.3f%n",a);
System.out.printf("%.2f%n",b);
System.out.printf("%.1f%n",c);
System.out.printf("%.0f%n",d);
System.out.printf("%9.2f%n",a);
System.out.printf("%9.2f%n",b);
System.out.printf("%9.2f%n",c);
System.out.printf("%9.2f%n",d);
}
}

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5^#

劉泳鱔發表於 2014-9-20 15:06 | 只看該作者

public class ch48
{
public static void main(String args[])
{
double a=4541.23456;
double b=454.123456;
double c=45.4123456;
double d=4.54123456;
System.out.printf("%.3f%n",a);
System.out.printf("%.3f%n",b);
System.out.printf("%.3f%n",c);
System.out.printf("%.3f%n",d);
System.out.printf("%7.2f%n",a);
System.out.printf("%7.2f%n",b);
System.out.printf("%7.2f%n",c);
System.out.printf("%7.2f%n",d);
}
}

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Rank: 1

6^#

許逸群發表於 2014-9-20 15:07 | 只看該作者

public class ch48
{
public static void main(String args[])
{
double a=4541.23456;
double b=454.123456;
double c=45.4123456;
double d=4.54123456;
System.out.printf("%.3f%n",a);
System.out.printf("%.3f%n",b);
System.out.printf("%.3f%n",c);
System.out.printf("%.3f%n",d);
System.out.printf("%7.2f%n",a);
System.out.printf("%7.2f%n",b);
System.out.printf("%7.2f%n",c);
System.out.printf("%7.2f%n",d);
}
}

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