i am doing the coursera homework, but even i use a break
in this loop
, it seems not break
, and i searched how to break a for loop, but i still can’t understand what i do is wrong. Could some nice guys explain it to me?
JavaScript
x
for (int j = 0; j < n; j++) {
boolean[] birthdaypeople = new boolean[n];
int birthday = (int) (Math.random() * n);
if (!birthdaypeople[birthday]) {
birthdaypeople[birthday] = true;
}
else {
peopleindex[j + 1]++;
break;
}
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Answer
You are initialising your birthdaypeople
array everytime in each iteration which is why the else
block is never executed because for every j
the birthdaypeople
array is new and have false
value. Take out the array declaration out of the for
loop.
JavaScript
boolean[] birthdaypeople = new boolean[n];
for (int j = 0; j < n; j++) {
int birthday = (int) (Math.random() % n);
if (!birthdaypeople[birthday]) {
birthdaypeople[birthday] = true;
} else {
peopleindex[j + 1]++;
break;
}
}