0 like 0 dislike
7.3k 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 | 7.3k views

70 Answers

0 like 0 dislike
Hidden content!
#include <stdio.h>
int is_prime(int n)
{
* * ** *** *** *** * **** i;

* * * * **** *** ***** *
* ******* ** * ** * ** * * * * * * **** * * ** * * * 0;

** *** * *** * ** **** **** *** * ** ** *
*** ** * * ** ******** * **
* * *** * * ** * *** *** * **** * * * ****
** *** * ****** *** ** * ** * **** * * ** * * * ** * ** 0;
** *** ** * * * *
* ***** * *** ** 1;
}

int main(void)
{
   int n;
* * ** * * ** **** *** ** * &n);
   if (is_prime(n)) * * * * ** * * *** * ** * * *** * * **** * function return 1
* * **** * * * * ***** ** * * * * *** ** ** * ***
*** *** * ** * *** * * * * * * ** * * ** ******* * *** * * *** ** **** *** *************** * *** **** *** ** * function return 0
* ** *** * **** **** * * * * ** * * * ** prime");
************ ** ** ** *** 0;
}
answered by (-140 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;
** *** ** *** ** ** * * (n<=1)
* ** *** * * * 0;
* * ** * ** *** (i=2;i<n;i++)
   {
* * * *** ** * * ***** * * * (n%i==0)
* * * ** ***** ** * * * *** *
* ** *** *** ** * ** * * ** * * * * * * **** ** ** 0;
* * ** * * ** * * * * * **** * ** **
**** * ***** * ** *** * *** ** ** * * **** *
* *** ** * * * ** * * * **
** * * **** ** *** *** *** * *** * *** * * * * 1;
****** ** * * * ** * * *** ***
   }
}

int main(void)
{
******** **** n;
* ** *** **** ** * *** *** * &n);
   if (is_prime(n)) * * *** * *** ** ** * *** * **** ** function return 1
*** * ** * ****** *** ** *** ** ****** * *
******** ** * ** * ** * * **** ** * ** * * ** *** **** * **** ******* **** * * * * **** ** * * ** **** ***** * ***** * * ** * * * **** function return 0
* * ** *** * * * ****** ***** *** * **** * prime");
* * * 0;
}
answered by (-66 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 ** * * * ** *
#include ** * ** * *
int is_prime(int n)
{
* * *** * *** * * divisor;
if (n<=1)
** * * *** ** false;
for (divisor *** * * * *** **** ***
* *** *** * * ** *
return true;
}
int main(void)
{
* **** ****** ** *** n;
* ** * ** * * *** *** *** ** * &n);
** *** **** (is_prime(n)) *** * **** * ** *** * * * * * * * ** ***** * function return 1
** *** * ** * ** * ** **** * * * **** * * ** **
* * *** * ** * ** * * ** * * * * * * ** * **** ***** **** ** * * ***** ** **** * ** ** * * * * * * * * ***** function return 0
** *** ***** * * * ** *** * * *** *** * * ** ** **
*** * ** **** ** * * 0;
}
answered by (16 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Wrong output
Case 4: Correct output
Case 5: Correct output
0 like 0 dislike
Hidden content!
int * **
if * ***
** *** ** * * false;
for * * *** * * ** *** ** ***
* * *** * * *** * *
** *** * ** * * * **** ** * ** false;
* ** true;
answered by (16 points)
0 0
prog.c:2:1: error: expected identifier or '(' before 'if'
 if (n<=1)
 ^~
prog.c:4:1: error: expected identifier or '(' before 'for'
 for (divisor =2;divisor*divisor<=n;divisor++)
 ^~~
prog.c:4:17: error: unknown type name 'divisor'
 for (divisor =2;divisor*divisor<=n;divisor++)
                 ^~~~~~~
prog.c:4:32: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<=' token
 for (divisor =2;divisor*divisor<=n;divisor++)
                                ^~
prog.c:4:43: error: expected '=', ',', ';', 'asm' or '__attribute__' before '++' token
 for (divisor =2;divisor*divisor<=n;divisor++)
                                           ^~
prog.c:7:1: error: expected identifier or '(' before 'return'
 return true;
 ^~~~~~
0 like 0 dislike
Hidden content!
#include <stdio.h>
int is_prime(int n)
{
***** **** **** * * * * * i;

* * ******* * ** *** **** **
* * * ** ** * * * *** ***** * * * * 0;

** *** * ** ** *** * * * ** ** * * * *
** ** ** * * ** **
** * * ****** * **** * *** * * * * ***** * *
** * *** * ** ** *** * * ** **** ** * * ****** * * *** ***** * **** 0;
** * **** * ** * *
***** ** * ** ** *** ** 1;
}

int main(void)
{
   int n;
* ** * **** *** ****** * * * * * &n);
   if (is_prime(n)) **** ** * ******* ** * * * **** * * * * ** * function return 1
** ** * *** * ****** ****** ** * *** * **** * * *
** *** *** * * * *** **** * * * * ** * * ** ***** * ***** ****** **** * *** *** **** * * *** ** **** * * * * ** function return 0
* * * *** ** * * * * * *** * ** *** **** * prime");
* * * *** ** 0;
}
answered by (-16 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)
{
******** **** *** ** * * YOUR CODE HERE*/
** **** **** * * * * i;
*** * ** *** * ** ***** ***
** * * * * * ** * 0;
* ** ****** *** ** * *
*** ** * ** ** * ******** * * *** *** * * *******
** * * * * ** * *** * ** * ** *** * * ** ** * * * ** * ** ** * 0;
** * ***** *** * *
* * *** * ** * ** **** * 1;


* * ** * * ****** ******* **
* ** * * * *** *** OF YOUR CODE*/
}

int main(void)
{
   int n;
* *** **** * ** *** ** * &n);
   if (is_prime(n)) * * * ** ** ** *** * * **** ** * *** * * * * function return 1
* *** * * ** * * * * * * * ** * *** ******* * **
* ** * * * **** * *** * * ***** *** * ** *** ** ** *** * * ***** ** * * * ** *** ** * *** * ** * * * ** ** ** ** ****** * ** * function return 0
**** * * ** * * ** *** * ** ** * * ** * *** prime");
** ** ** * * * * 0;
}
answered by (-329 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, flag;
* ****** ** * ** * *** * i<=n/2; ++i)
    {
** * *** * * * *** *** ** * * * * ** *** *
* * * *** * * * * ** * ** * * ** *
* * ** ** *** ** ** **** * ***** * ** * ** * * * * * * * * ***** * * *
* * ** ** * ***** * ** * ** * ** * * * ********* ***** *
* *** * ** ** * * * ** *** * ** * * * *
    }
}

int main(void)
{
* * * * ** **** n;
* **** * ** * ** **** ** ** ** &n);
* * *** ** * ****** (is_prime(n))
* ** * * * ***** * * * ** * * ******* * ** * ***** * * * *
** ***** * * * ** *
* ****** * * * * ** * * * **** * ** *** ** prime");
** * ** * * * * *** *** 0;
}
answered by (-168 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){
int i,c;
{
** ** *** ****** **** (i = 1; i <= n; i++) {
**** * * * * * ** * ** *** * * * * *** * (n % i == 0) {
** * **** * * *** ***** *** * ****** **** ** * * * * ** * * ** * * *
** * ******** * **** * * ** * ** *
* * ** *** ** * *
* * *** ******** * (c == 2) {
* *** *** **** * * * * *** ** ** * **** * ** ** 1;
* *** * * *** ** * **
* * * * ** ** *** {
**** * ** **** ** * ** *** * ** * * * ** * *** 0;    }
    
}
***** ** * *** ******* * * 0;
}

int main(void)
{
* **** **** * ** *** * n;
* ** ** ** * ** ** **** ** ******** &n);
* * ***** * * * ** * (is_prime(n)) * * * * * ** * ** * * * *** *** * ***** function return 1
** ***** **** ** * * * * *** * * * * * * * * * *** ** * * * *****
** * * * ** *** * * * ** **** ** *** * ** * ** ** ** ** ** * ** **** ** ** * ******** * * * * * * * * ********* *** * * **** * ** ** function return 0
** * ** ** * * **** *** ** **** * * * * ** * prime");
**** ****** * * * ** * 0;
}
answered by (323 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)
{
* * **** ** * ** j, flag = 1;
* *** * * * ** * * * **** *
* * * ** * ** *** ***** * 0;

* ****** * * * ** * *** * j <= n/2; ++j)
**** * ** * * * * * *
** *** ** ** * * ** * * * ** * ** * * *** *** * (n%j == 0)
* * * ** *** * *** ***** * * * * ** * * *
* * ** * *** ***** *** *** *** ** * * *** * * ** *** * * * ** =0;
**** **** * ** *** ***** * **** * ** * * *** **** * * ****
***** * *** * * * * * ** ** ****
* * * ** * ********
* * ** * *** *** **** ** * flag;
** **** *** * * ** * * YOUR CODE HERE*/

* * ** **** * * * * ** ****
** ****** *** * * ***** OF YOUR CODE*/
}

int main(void)
{
   int n;
* ***** ** ****** * * ** * &n);
   if (is_prime(n)) *** * * ********* *** *** * *** * * ** * ** ** function return 1
**** * * * ** ** * ** ** ** ** * * * ** **
** *** ** ** * * *** * ** *** * * * ** ** ** * * *** ** ***** **** ***** * * *** * ** * ***** ****** *** * * ** *** * ** * * function return 0
* * **** ********* * ****** * ** * * prime");
* * ** ** *** * **** * * 0;
}
answered by (-167 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)
{
*** * * ** ** ** **** ***** * cpt,a;
**** * * **** * * *
** * * * *** * * * * **** * (cpt=2;cpt<=n;cpt++)
* * * **** * * * * * ** * **** * * ** * *
* **** *** ** * ** * ** **** *** ** ** ** ** * * **** * * * * * * (n%cpt==0)
*** * * *** * *** * * * * **** * * * * ** *** *** *****
** ** * * **** **** ** * *** * * * * * * *** ** * * * * **** * ** * * **** * **** *
* * ** *** * *** ** * **** **** * * ***** **** * ** ***** *** ***
** ** ** ** * * ** ** * ** * * * * * **
* ***** ** * ** * * **** * * ** *** * ********* (a==1)
** **** * * * ** * * *** * ***
* *** ** * * * *** *** * * * * ** * * ** * * **** ** 1;
* * * *** *** * *** * ** * * * * **
** * * * * *** * ** * * ** * ** * * 0;}

* ** ****** * * * * ** YOUR CODE HERE*/

*** ** * * * * ** * * * * *
   /*END OF YOUR CODE*/
}

int main(void)
{
   int n;
** ** ***** ***** * * * ****** * * &n);
   if (is_prime(n)) * ******* * **** * * ** * ** * *** ** * ****** function return 1
* ***** ** ** * * * **** **** * ***** ** * *
   else **** ***** *** * * * *** * * ***** * ** * * * * * ** ** * * * * * * ** ** * * * ** * * * * * * **** *** function return 0
*** ** ** *** ** * * ** * ** * * **** *** * * prime");
   return 0;
}
answered by (-168 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:172.69.17.188
©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
| 4.9k 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
| 5.4k 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
| 11.1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users