0 like 0 dislike
8k 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 | 8k 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:172.70.178.80
©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
| 5.3k 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
| 5.7k 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
| 11.9k views
12,783 questions
183,442 answers
172,219 comments
4,824 users