Wikipedia:Reference desk/Archives/Computing/2020 July 27
Computing desk | ||
---|---|---|
< July 26 | << Jun | July | Aug >> | July 28 > |
Welcome to the Wikipedia Computing Reference Desk Archives |
---|
The page you are currently viewing is a transcluded archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
July 27
[edit]Java!
[edit]Hi guys, can you help me figure out how could the first line of the output was correct and the others were not? Thank you! Deep humility (talk) 19:06, 27 July 2020 (UTC)
// Print a conversion table of inches to meters.
// Display 12 feet of conversions, inch by inch.
// One meter equals approximately 39.37 inches.
/* 1 inch = feet = meters;
* 2 inches = feet = meters;
* 3 inches = feet = meters;
* n inches = n feet = n meters;
*
* 144 inches = 12 feet = meters;
* */
/* 1 meter = 39.37 inches.
*
* (1/39.37) meter = 1 inch.
* */
/* 1 feet = 12 inches;
*
* (1/12) feet = 1 inch;
* */
/* 1 inch = (1/12) feet = (1/39.37) meters;
* 2 inches = 2 * (1/12) feet = 2 * (1/39.37) meters;
* 3 inches = 3 * (1/12) feet = 3 * (1/39.37) meters;
* n inches = n * (1/12) feet = n * (1/39.37) meters;
*
* 144 inches = 12 feet = 3.6576 meters;
* */
public static void main(String[] args) {
// TODO Auto-generated method stub
int counter = 1;
int n = 1; // multiple;
for (int inch = 1; inch < 145; inch++) {
float feet = (float) ((n) * (inch / 12.00));
float meter = (float) ((n) * (inch / 39.37));
if (inch == 1) {
System.out.println(inch + " inch is " + feet + " feet or" + meter + " meters.");
} else {
System.out.println(inch + " inches equal " + feet + " feet or " + meter + " meters.");
}
n = n + 1;
}
}
Output:
1 inch is 0.083333336 feet or 0.02540005 meters.
2 inches equal 0.33333334 feet or 0.1016002 meters.
3 inches equal 0.75 feet or 0.22860046 meters.
4 inches equal 1.3333334 feet or 0.4064008 meters.
5 inches equal 2.0833333 feet or 0.63500124 meters.
- What is "n"? Why are you incrementing both inch and n? -- Finlay McWalter··–·Talk 19:17, 27 July 2020 (UTC)
Solved:
What a careless mistake! I ignored that inch
is incremental due to inch++
. 😳😳😵😵😬😬😱😱 Deep humility (talk) 19:19, 27 July 2020 (UTC)
public static void main(String[] args) {
// TODO Auto-generated method stub
int counter = 1;
int n = 1; // multiple;
for (int inch = 1; inch < 145; inch++) {
float feet = (float) (inch / 12.00);
float meter = (float) (inch / 39.37);
if (inch == 1) {
System.out.println(inch + " inch is " + feet + " feet or " + meter + " meters.");
} else {
System.out.println(inch + " inches equal " + feet + " feet or " + meter + " meters.");
}
n = n + 1;
}
}
User:Finlay McWalter, I modified my code a bit and the output appeared to be correct now. Thank you for your attention and enlightenment! Deep humility (talk) 19:21, 27 July 2020 (UTC)
- Nitpicking: one meter is not 39.37 inches. Instead, one inch is defined to be exactly 0.0254 meters and one foot is exactly 0.3048 meters. 93.142.89.209 (talk) 22:02, 27 July 2020 (UTC)
- To be fair, 1 m was exactly 39.37 inches in the US... until 1959 when the inch was redefined. See Foot (unit)#Definition. --174.89.49.204 (talk) 22:42, 27 July 2020 (UTC)
- Indeed it was. One learns something new every day! 93.142.89.209 (talk) 04:25, 28 July 2020 (UTC)
- Oh! Thanks for the information. I was just using my reference e-book's tip! Deep humility (talk) 15:42, 28 July 2020 (UTC)
- Your code is correct now, but note also that you don't need the variables
counter
andn
for anything. JIP | Talk 10:36, 28 July 2020 (UTC)- Ahh, yes, you are right. Thank you! Deep humility (talk) 15:42, 28 July 2020 (UTC)