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:104.23.243.108
©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