Difference between revisions of "CIS 3020 Part 6"
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| Line 2: | Line 2: | ||
|__TOC__ | |__TOC__ | ||
|} | |} | ||
| + | ==Ordering of Statements in Methods== | ||
Consider the following two methods: | Consider the following two methods: | ||
{| | {| | ||
| Line 26: | Line 27: | ||
} | } | ||
} | } | ||
| + | </pre> | ||
| + | |} | ||
| + | * Do they calculate the same values? | ||
| + | * Do they do the calculations in the same way? | ||
| + | * Do they print the same results? | ||
| + | ===Execution=== | ||
| + | {| | ||
| + | |+ Executing with x=4: | ||
| + | |- | ||
| + | | | ||
| + | <pre> | ||
| + | Entering count1(4) | ||
| + | 4 | ||
| + | Entering count1(3) | ||
| + | 3 | ||
| + | Entering count1(2) | ||
| + | 2 | ||
| + | Entering count1(1) | ||
| + | 1 | ||
| + | Entering count1(0) | ||
| + | 0 | ||
| + | Exiting count1(0) | ||
| + | Exiting count1(1) | ||
| + | Exiting count1(2) | ||
| + | Exiting count1(3) | ||
| + | Exiting count1(4) | ||
| + | </pre> | ||
| + | || | ||
| + | <pre> | ||
| + | Entering count2(4) | ||
| + | Entering count2(3) | ||
| + | Entering count2(2) | ||
| + | Entering count2(1) | ||
| + | Entering count2(0) | ||
| + | 0 | ||
| + | Exiting count2(0) | ||
| + | 1 | ||
| + | Exiting count2(1) | ||
| + | 2 | ||
| + | Exiting count2(2) | ||
| + | 3 | ||
| + | Exiting count2(3) | ||
| + | 4 | ||
| + | Exiting count2(4) | ||
</pre> | </pre> | ||
|} | |} | ||
Revision as of 15:57, 13 April 2007
Ordering of Statements in Methods
Consider the following two methods:
public void count1(int x) {
if (X <= 0) {
System.out.println(x);
} else {
System.out.println(x);
count1(x-1);
}
}
|
public void count2(int x) {
if (X <= 0) {
System.out.println(x);
} else {
count2(x-1);
System.out.println(x);
}
}
|
- Do they calculate the same values?
- Do they do the calculations in the same way?
- Do they print the same results?
Execution
Entering count1(4) 4 Entering count1(3) 3 Entering count1(2) 2 Entering count1(1) 1 Entering count1(0) 0 Exiting count1(0) Exiting count1(1) Exiting count1(2) Exiting count1(3) Exiting count1(4) |
Entering count2(4) Entering count2(3) Entering count2(2) Entering count2(1) Entering count2(0) 0 Exiting count2(0) 1 Exiting count2(1) 2 Exiting count2(2) 3 Exiting count2(3) 4 Exiting count2(4) |
