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