0 like 0 dislike
18k 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 | 18k 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:104.23.243.109
©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
| 13.1k 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
| 12.2k 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
| 26.6k views
12,783 questions
183,442 answers
172,219 comments
4,824 users