0 like 0 dislike
15.5k views

寫一個判斷是否為質數的程式

We have the uncompleted program below:

#include <stdio.h>
int is_prime(int n)
{
   /*INSERT YOUR CODE HERE*/

   /*在這裡寫你的程式*/
   /*END OF YOUR CODE*/
}

int main(void)
{
   int n;
   scanf("%d", &n);
   if (is_prime(n))         // function return 1
      printf("Prime");
   else                     // function return 0
      printf("Not prime");
   return 0;
}

Please complete this program by only insert your code between those tags:

   /*INSERT YOUR CODE HERE*/
   /*END OF YOUR CODE*/

Remember: prime number is a whole number greater than 1, whose only two whole-number factors are 1 and itself.

You may correct the cases, but your code always be revised!

[Exercise] Coding (C) - asked in Chapter 9: Functions by (5.2k points)
ID: 35783 - Available when: 2017-12-07 18:00 - Due to: Unlimited

edited by | 15.5k views

70 Answers

0 like 0 dislike
Hidden content!
#include <stdio.h>
int is_prime(int n)
{
* * **** * * *** * * i;
* ** ***** ** ** **** * return 0;
** * * * * *** * **** if(n==2) return 0;
** ** * ****** ** **
** * ** **** ****
** **** ******* * ** ***** ** ** *** * * * * *** ***** *
*** *** *** * ** *** * * * *** * * * * ** ** ** *** *****
* ** * ** * ******* * * * * * * * * * * * * ** ** *** * ** * * *** * ** * * ** * ** return 0;
*** * * * * * ** *** * * *** ** * * * * ** * * * * ** * *** *
*** *** * ** ***** *** * ** * * *** ** * * ** * * * * ******** * **** 1;
* * *** **** * * **

}
int main(void)
{
   int n;
* * ** *************** **** * ** *** * &n);
   if (is_prime(n)) * ** * * * * * * ******* **** *** * ** * * function return 1
* * ** * ** *** ** *** * ** ** *** * **** *** *
   else * * *** * ******* * ** * * * * * * *** *** ** * ** ** ***** **** * * * * * *** ** * * * *** function return 0
* * ** * **** ** * * *** **** *** * * * prime");
* ***** * ***** * * *** 0;
}
answered by (-301 points)
0 0
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
Case 3: Correct output
Case 4: Wrong output
Case 5: Correct output
0 like 0 dislike
Hidden content!
#include <stdio.h>
int is_prime(int n)
{
   int i;
* * * * ** * * **** ** ******
   {
* * * * ** * * * *** ** ** * *
* **** ***** **** *** *** ** ** * * * * * * ** *
   }
** * ** * * * *** * ** **
** * *** *** ***** * * * * ** ** ** * *
*** * *** * * *** * * ** **** ** * *** * ***** * * *** * ** 1;
* * * * * * ** * ***** * * * *** *** * *
* * ** **** * * *** *** * ** ** * *
** * ***** *** ** * * * ** * * * * * ****
***** * * ****** ** ** * * ** * ** * * * **** * ** 0;
* ***** ** ********** ** * ** ** ***
}

int main(void)
{
   int n;
* ** * * * ** * * * ** * ***** &n);
   if (is_prime(n)) * * * * * * * * ** **** * * function return 1
*** **** *** ** * ******** * ** * *** * * * ** **
* ** *** * *** ***** *** **** *** ** * * * * ** ** ** * * *** * * ** *** * ** ** *** ** * ** * * ** * *** * * * ** function return 0
** ** ****** ** *** ** **** * *** ** ** * * ** prime");
* * *** *** * * * 0;
}
answered by (-255 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
Case 4: Correct output
Case 5: Correct output
0 like 0 dislike
Hidden content!
#include <stdio.h>
int is_prime(int n)
{
***** *** * *** *** * * ** i;
****** ** * * * <= 1)
* * * * *** *** **** ** ***** *** ** *** * 0;
*** ** ** * * * ** * * * = 2 ; i < n ; i++)
**** ** ***** * *
* ** ** *** * * ** * ***** ***** ******* ** *** != 0)
** ** * ***** *** * * ** * ** ** ** ** ** * * *** * **** * * * * 1;
* * * * *** * ** ** * * * * *** * *
* * *** ****** ** ** *** **** **** * * *** ******** * * ** * *** ****** * 0;
* *** ** ** * ** ***** *
}

int main(void)
{
   int n;
* * *** * * **** **** * *** ** &n);
   if (is_prime(n)) ***** * * * *** **** * * ** * * **** * function return 1
* *** * * * ** **** *** *** * * *
****** * ************ ** ** * * * ** **** * ** * * * ** ** *** **** * ** * *** * ** ** * ** ***** ** ** function return 0
* *** * *** * ** ** ** ** **** ** ** **** ** * prime");
* * * * ** * *** ** * 0;
}
answered by (-255 points)
edited by
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
Case 4: Correct output
Case 5: Correct output
0 0
Case 0: Wrong output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
Case 4: Correct output
Case 5: Correct output
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
Case 4: Correct output
Case 5: Correct output
0 like 0 dislike
Hidden content!
#include <stdio.h>
int is_prime(int n)

{
** * **** **** ** ** flag=1,i;
* **** * ** * * ** *** i<=n/2; i++)
   {
*** * ** * ** * * * ** * ** * * ** *** * * *
*** * * ***** * *** * * * *
* * * * ** * * ** * * ** * ** * * *** ***** **** * * * *
* ***** ** ** * * * ** * * *** * ** ** ** ** * ** * * * ***
* * * ** *** ******* **** ** *** *
*** * *** * * ******* ** * * * * *****
*** ** *** ** * * *** * ** *** * **** **** * flag = 1;
   }
}

int main(void)
{
* * * ***** * * * n;
* * *** *** * * ** * ** * **** ** * &n);
   if (is_prime(n)) * * * * * * *** ***** * ***** * ** ** function return 1
** * ****** **** * ** *** * *** * ** * * * ** *
* * ****** * * * * ** * * ** **** ** * * * ** * * ** ** * ** * ** * * * *** * ** * * ** *** *** * ** * * * * * * function return 0
* ** ** * ** * **** * * * *** * ** prime");
** * *** *** * * *** 0;
}
answered by (-281 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
Case 4: Wrong output
Case 5: Correct output
0 like 0 dislike
Hidden content!
#include <stdio.h>
int is_prime(int n)
{
*** ** ** * * * ** ** ** i = 0;

****** * ***** * * ** * * flag = 1;

* ******** *** * * * **** ** <= 1)
* * * * * ** * ** *
* * ** ** ** ********** ** *** ** * ** 0;
** * * * * ** ** * * * *****

* *** * * * * * ** * * ** = 2; i < n; i++)
* ** ******* ** * ** *
****** * * ** * ** * * * **** ** ** *** * % i == 0)
*** ** * * * * *** ** * ** **
** * *** * * * ** **** ** * **** **** ** ** ** **** * * ***** *** * = 0;
******** ** ** * * * ** * ** *** ** * ***
*** ****** * ***
*** * * ** * * *** * flag;
}

int main(void)
{
   int n;
** * * * * * ** * * ** ** * **** * &n);
   if (is_prime(n)) * * * ** * * * * * * ** * *** * ** * ** **** function return 1
** **** * ** * ** * ** *** * ** * * * *** *
*** * * ******* ***** *** ** ** **** **** *** ** ** * * * **** * * * * * ** * *** ** ** ** ***** *** * * **** * * ** * * * * * * function return 0
**** ** * * *** * ** * * * * ** ** prime");
* * ** ** *** * 0;
}
answered by (-285 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
Case 4: Correct output
Case 5: Correct output
0 like 0 dislike
Hidden content!
#include <stdio.h>
int is_prime(int n)
{
* * * * ** ** * i;
***** * * * * *** * j=0;
** ** **** ** ** * * * ***** ***
   {
* * *** ** ** ** * * * ****** *** * *** * *
** ****** * ** * ** * * ** * * * * * *
* ** * * * ** ** ** ** * ***** ** * ** * * ** ** ** *** 0;
* *** ** * *** * *** * ** ******
* ** * ** *** * ** **** * * ** **
* * ** * *** * * * ** * ***** * ***** **** * ** 1;
   }
}

int main(void)
{
** * **** * * ** * * n;
* * *** ** ***** * * *** * * **** * ** &n);
   if (is_prime(n)) ** ** * ** * * * *** ** ** ** ** * * ******* function return 1
** * *** ** *** ********* ** * ***** ** * ******* **** **
**** * * * * ** * ** **** ** * ****** * ** **** * * * ** * **** * *** * * ** * * * ** * * * *** * ** ***** * * ** * ** * function return 0
*** **** **** * **** ** * * * ** prime");
* * ** ** ** 0;
}
answered by (-329 points)
0 0
Case 0: Wrong output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
Case 4: Wrong output
Case 5: Correct output
0 like 0 dislike
Hidden content!
#include <stdio.h>
int is_prime(int n)
{
**** **** * * ** flag,flagb,i;

* * * * * * * (n==1 || n==0)
** * *** * **
*** * * * * * * **** * ** * ** ** * * 0;
**** * * * *
*** * ** ** *** *
*** ** *** ** ***** * *** *** *
   {
****** ** * * * **** *** ** *
* * * * * ** *** * * ***** * * ***** ** * ** ******
**** ** * * * * **** * ** * * *** * * (flag==0 && n!=i)
** * * * **** ** * ** * * * *
*** ** * * *** ** * ****** * * ** ** * * *** * * * * * * ** 0;
* * * ***** * * **** *** * ** * *** *
   }
* * * *** ** ** (flag==0 && flagb==1)
**** ** * ******
* ** *** *** * ** * ****** * * * 1;
* **** * ** * * **
}

int main(void)
{
***** *** * **** * * n;
* * ** *** ** * **** * ** * * ** ** * &n);
* ** * *** ** ** (is_prime(n))
* ** * * *** * *** * ** *** *** *** ** * *** *
* * ***** * *
** * * *** *** ** **** * ****** * ** ** * prime");
****** * **** ** * * 0;
}
answered by (-249 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
Case 4: Wrong output
Case 5: Correct output
0 like 0 dislike
Hidden content!
#include <stdio.h>
int is_prime(int n)
{
if(n<2)return 0;
int i,j,flag=1;
** ****** * * * *
* *** ** ** ** *****
* * *** ** * * *** ** * **** ** ** * *** ** * *
** * ** ** * *** * * ** ** ** *** flag=0;
** * ** **** * *** *
***** *** *** * * ** * * flag;
}

int main(void)
{
* *** * ** * ** n;
** *** ** **** * ** * * * * * *** &n);
********* * * * * * (is_prime(n)) * ** ** *** ** ***** * * * * ***** * * * function return 1
* **** ****** * *** *** * ** * * ** * * ** **
* ** *** ** * * ** * ******** ** * * *** ******** * * **** * *** * * * ** *** * *** * * * ** **** * * * ** *** * *** ** ***** ** * function return 0
*** * ******* * * * * * * ** * * * **** prime");
** ***** * ***** ** 0;
}
answered by (-32 points)
edited by
0 0
Case 0: Wrong output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
Case 4: Wrong output
Case 5: Correct output
0 0
Case 0: Correct output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Correct output
Case 4: Wrong output
Case 5: Wrong output
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
Case 4: Correct output
Case 5: Correct output
0 like 0 dislike
Hidden content!
#include <stdio.h>
int is_prime(int n)
{
* * *** ** **** * * ** i = 0;

* *************** * ** * *** flag = 1;

*** *** * ** * * ** *** = 2; i < n; i++)
* ** *** * * * *** * *
* *** * * * ** ** * * **** * * % i == 0)
*** ** **** * *** ** * * * ** * ** * * **
******* * * ** * ** *** ***** **** **** ** * * * *** * ** * * * = 0;
* * * ** * * * * * * * * * ** *
* ** * * * * * *
* *** * *** * * * * ** flag;
}

int main(void)
{
* ** * * * ** n;
** * * ** * * ***** * * * &n);
   if (is_prime(n)) *** ** *** * * * * ** * ** * function return 1
**** * ** * * ** **** * *** * * ** * *
* * * ** * ** **** **** * * * ** * ***** * * * ** * * **** * * ** *** *** * **** *** ** * *** ** *** * * * *** ** ** * function return 0
*** * * * * ** ********* **** * ** * *** prime");
****** ** * ** * 0;
}
answered by (-285 points)
0 0
Case 0: Wrong output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
Case 4: Wrong output
Case 5: Correct output
0 like 0 dislike
Hidden content!
#include <stdio.h>
int is_prime(int n)
{
** * *** * ** **** * YOUR CODE HERE*/
* * * **** * ** i;
** ** * ** * ** ** **** * 0;}
* * * *** **
**** * ******* ** ** * * * * *
   {
* **** * **** ** ** * ** **** prime
*** * *** * * * ** ** **** *** * ** ** *
*** ** * *** * ** ** * ** * **** * *** * ** * * 0;
* ** ** * * * * *** *** **** ** * ** *
** ***** * * ** * *
return 1;
}
* * * ** ** * * * ** * OF YOUR CODE*/
}

int main(void)
{
***** **** ***** n;
* ** ** * * * ***** * * *** * ** * &n);
* * * * * ** * (is_prime(n)) * * *** ** * **** ** ** ** * ** ** * * * * ***** function return 1
* ** * * * ** *** * * *** * ** *** ** * * * **
*** ** ** * * *** * * *** ********* ***** * * *** *** * ** ** ** *** * ******* * * * * ** * * ** * * **** ** **** * *** ** function return 0
*** *** * * **** ** * **** * * * * **** prime");
* * * * ** ****** ** **** 0;
}
answered by (-336 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
Case 4: Correct output
Case 5: Correct output
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:162.159.115.31
©2016-2026

Related questions

0 like 0 dislike
47 answers
[Exercise] Coding (C) - asked Dec 7, 2017 in Chapter 9: Functions by semicolon (5.2k points)
ID: 35785 - Available when: 2017-12-07 18:00 - Due to: Unlimited
| 10.9k views
0 like 0 dislike
45 answers
[Exercise] Coding (C) - asked Dec 7, 2017 in Chapter 9: Functions by semicolon (5.2k points)
ID: 35784 - Available when: 2017-12-07 18:00 - Due to: Unlimited
| 10.5k views
0 like 0 dislike
99 answers
[Exercise] Coding (C) - asked Nov 2, 2017 in Chapter 6: Loops by semicolon (5.2k points)
ID: 29829 - Available when: 2017-11-02 18:00 - Due to: Unlimited
| 23k views
12,783 questions
183,442 answers
172,219 comments
4,824 users