第147題

Given:
1. public class LineUp{
2. public static void main(String[] args){
3. double d = 12.345;
4. //insert code here
5. }
6. }
Which code fragment, inserted at line 4, produces the output 12.345?
A. System.out.printf("%7d \n", d);
B. System.out.printf("%7f \n", d);
C. System.out.printf("%3.7d \n", d);
D. System.out.printf("%3.7f \n", d);
E. System.out.printf("%7.3d \n", d);
F. System.out.printf("%7.3f \n", d);
答案：F
參考：10-2 Console類別

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System.out.printf("%7.3f \n", d);
// 7 = 寬度
// .3 = 小數點後幾碼
// f = 類型 float.