0 like 0 dislike
15.6k 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 | 15.6k 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:104.23.243.165
©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