0 like 0 dislike
13.2k 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 | 13.2k 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:172.69.17.67
©2016-2025

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
| 9.2k 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
| 9.1k 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
| 19.7k views
12,783 questions
183,442 answers
172,219 comments
4,824 users