How can I retHow can I return a sequence of random numbers which dont repeat at all?
Submitted by: AdministratorWhat you're looking for is often called a ``random permutation'' or ``shuffle.'' One way is to initialize an array with the values to be shuffled, then randomly interchange each of the cells with another one later in the array:
int a[10], i, nvalues = 10;
for(i = 0; i < nvalues; i++)
a[i] = i + 1;
for(i = 0; i < nvalues-1; i++) {
int c = randrange(nvalues-i);
int t = a[i]; a[i] = a[i+c]; a[i+c] = t; /* swap */
}
where randrange(N) is rand() / (RAND_MAX/(N) + 1)
Submitted by: Administrator
int a[10], i, nvalues = 10;
for(i = 0; i < nvalues; i++)
a[i] = i + 1;
for(i = 0; i < nvalues-1; i++) {
int c = randrange(nvalues-i);
int t = a[i]; a[i] = a[i+c]; a[i+c] = t; /* swap */
}
where randrange(N) is rand() / (RAND_MAX/(N) + 1)
Submitted by: Administrator
Read Online C Programming Job Interview Questions And Answers
Top C Programming Questions
| ☺ | Why does this code crash? |
| ☺ | What is wrong with this declaration? |
| ☺ | How can I read/write structures from/to data files? |
| ☺ | What does static variable mean in c? |
| ☺ | How can I increase the allowable number of simultaneously open files? |
Top Coding/Programming Categories
| ☺ | Python Interview Questions. |
| ☺ | OOP Interview Questions. |
| ☺ | Software engineering Interview Questions. |
| ☺ | PHP Interview Questions. |
| ☺ | VBA (Visual Basic for Applications) Interview Questions. |
