0 like 0 dislike
6.8k views

質數(Prime number),又称素数,指在大於1的自然数中,除了1和該数自身外,無法被其他自然数整除的数(也可定義為只有1與該數本身两个因数的数)。 大於1的自然數若不是質數,則稱之為合數。 例如,5是個質數,因為其正因數只有1與5,而6則是個合數,因為除了1與6外,2與3也是其正因數。

 

請寫一個程式,讓使用者輸入一個正整數,程式會判斷這個正整數是不是質數。

 

輸入範例1:

9

輸出範例1:

not a prime

輸入範例2:

2

輸出範例2:

is a prime

[Exercise] Coding (C) - asked in 作業 by (18k points)
ID: 13427 - Available when: Unlimited - Due to: Unlimited
| 6.8k views
0 0
Called for Help

67 Answers

0 like 0 dislike
Hidden content!
#include * ** * **

#include ** * ** * *



int main()

{
* ** *** *** ** **** x, y, z=0;
* * ** * * * * **** * &x);
*** ** * *** = 2;y < x;y ++)
* * ** * * **
* ** * **** *** ** * * ***** ****** ** % y == 0)
* **** ** * * * ** ******* * ** * * ** *** ** = 1;
* ** *** * ** ***
****** ***** ** * == 1)
*** * ** * * *** * * **** ** * ** * ** * a prime");
* * * * * *** * ** * ** * * a * ** *


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

}
answered by (-188 points)
0 like 0 dislike
Hidden content!
#include <stdio.h>



int main()

{

    int a,i;

    
** ** ** ****** * ***** * ** ******* **
** **** *** * ** ****** = 2 ; (i*i)<=a ;i++)

    {
* *** * ** *** * * ** *** * **** ***
** * ** *** ** *** **** * ** *
*** * * ** * * * * ** **** **** * * ** ** * ***** ** * a prime");
* **** * ** * * *** * * * * * * * * * * * *** *** * * * * **** * *
* ** * * * ******** * ** * *** * * ** * ** **** * *** 0;
* ** ** * * * * ** * ** ** ****
* * * * ** * * **** * * ** ** * ******
**** * * ** ** * *** * ** ** ** ******* a prime");
** * ****** * *** * * ****** *** * * * **
**** * * **** ** * ** * *** * ** 0;
* * ** ** * *** **** ** * * ** * * ** * *** ** * ** *
answered by (70 points)
0 like 0 dislike
Hidden content!
#include <stdio.h>

#include <stdlib.h>

int main()

{
** * * * * ** * i;
** * * * **** ** ** ** n;
* ** ** * * j=0;
* * * ** *** ******** * **** * * * * &n);
** * * * * *** * *** (i=2; (i*i)<=n; i++)
* *** ** * ** **
* * ** **** ** * * * ** * *** * * ((n % i)== 0)
** * ** * ***** * * **** * ******
* ** *** * * * ******* ** ** ** **** **
** ** ** ******** * ***** * * ** ** ***
** ** * ** * ** *** * **** * ****** ****
**** *** ***** *********
* **** * ** * *** ** **
* * * * ** ** *** == 1)
* * * * **** ** ("not a prime\n", j);
* ** ******* * ** ******* *** if (j == 0)
* * * * ** *** ** * ** * * *** * a prime\n", j);
* * **** ** * ** *
*** * * ** *** ** ** **** **** * * ** *** *
** * * *** ** * ** ** 0;

}
answered by (-110 points)
0 like 0 dislike
Hidden content!
#include **** *** * ***

#include ** **** *



int main()

{
* * ***** *** * x, y, z=0;
* *** **** *** **** * ** input a ********** **
**** **** * * ** * * * * * &x);
* * *** ** ** = 2;y < x;y ++)
*** *** *** * * ***
*** *** * * *** * ****** *** **** * * % y == 0)
** **** * * * ** * ** * * ** *** *** **** = 1;
* ** *** **** ** ** *
* * ** ******* == 1)
* * * **** *** * ** * * * * a ** ** *
* **** ** *** * ** *** ***** * a prime");


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

}
answered by (-188 points)
0 like 0 dislike
Hidden content!
#include <stdio.h>

#include <stdlib.h>

int main()

{

    int a,j;
**** * *** ** * ** * * * *** ** *** * *
* * * * ** *** ** * * * **

    {
* * * ** * ** * *** ** ** * * **** ** * *** *** *** * ** * * ** ********* *** * * * * ** * **** ** ****** *** * *** ***** * * * * ** *****
* ** * *** ** * * * * * * *** * * * * * * ** * * ****** * * ** * ** * *** ******* * * *** * ** * ****** ** ** ****** * ** * *
* * ***** ** * ** * * ** * * ** * ** ****** **** * *** **** ** * ** * * ****** * * *** * * ** * ***** ** ** **** * *** * * * * *** * not a prime");
* **** * ***** ***** ** ** ** * ** *** ** * * *** *** * ** *** * * * ** * * * ** **** * ****** ********* * *** * *** ** ** * * * * ** *** ** * ** ** **
*** * * * * * * * * **** * ** *** * *** *** * * **** * * ***** * ** ***** ** *** ** * **** *** * *** * ** **** ** * **** * ** * 0;
* * * * ** * * * *** * * *** *** * **** * * ** * * ** * ** ** * * ** ** * ** * * * * **** * * ***** * * * * * ** ** * **** *****

    }    

    printf("is  a prime");
** ** ** *** * * ** * * *** ** * * **** ***

    return 0;

}
answered by (-284 points)
0 like 0 dislike
Hidden content!
#include <stdio.h>

#include <stdlib.h>

int main()

{
** * **** * ** ** * *** num = 0 , i = 2 ;

    
* * * * * ** ** ** * ** ** ** * * * ** *****
** * * * **** * ** *** = 2 ; (i*i)<=num ;i++)
****** ** * * * ** *
* * * *** ** * ** * * * ******* * * ** ** *
** **** *** *** ** *** * ******* ** ****
* ** * * * *** * * **** ** ** * * * **** * * ** ** ** * * a prime");
**** * ***** **** * *** ** ** * * *** * * * * * * **** * * *** ** *** * ** ***
** * ** * * **** * *** ** ** * ** * ** ** * ****** * 0;
*** ***** ** ********* * * * * * * *
***** *** * * *** ** *** **** **    
* * * * * ***** * * * *** ** *** * ** * a prime");
** * * * * ** ** * *** * ** * ** **
** ** * **** *** ***** ** 0;

}
answered by (-162 points)
0 like 0 dislike
Hidden content!
#include <stdio.h>

#include ** * * *



int main()

{
* ** *** ***** ** **** ** num, test, testNum;
** **** * ** ** ** ** *** * * ** ** &num);
*** ** * * * **** * (testNum = 2; testNum < num; testNum++)
* * * * * ** * * **
** * * * **** * * **** * * ** * * ** * ** ** = num % testNum;
** * * ** * ** *** * ** * * **** * ** (test == 0)
* * ** ** *** * * ** ** ** *** ** *****
** ** * *** ** * * * * * ** **** * * ** * ** * * * * * *** * * * a prime\n");
* * * ** ** * * * ** ** * * **** ** * * * * * * * *** ** 0;
* * ** ****** ** ** * * * ** * *** ** *
* ** * * * ** *** **** *
*** ** ** *** *** ** * a prime\n");


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

}
answered by (-214 points)
0 like 0 dislike
Hidden content!
#include <stdio.h>

#include **** * ** * **



int main()

{
* ** * ** * *** * * * *** num, test, testNum;
** * * ** ** ** * * * * * * ** * &num);
*** * * ** * ***** ** * ** (testNum = 2; testNum < num; testNum++)
** *** ** * * *** **
* * * *** ***** * * *** ** * ** * *** = num % testNum;
** * * ** ** * * * ** * * ** ** * * ******* (test == 0)
* * ** * * ** ** * * ** * * ******** * * *
** **** ** * *** * **** * * ** **** * * *** ** * *** ********* a prime");
* ** * *** ***** * *** * * *** *** * * * ** * ** ** * 0;
* * *** ******** * * * *******
**** * ** * * *
* * ** * **** ** * ** a prime");


** * * * * ** * * ** 0;
answered by (-214 points)
0 like 0 dislike
Hidden content!
** * ** ** * **

*** *** * *** *



int *

{

int ***

* ** ** **
****** * ** * * ** **

* ** ** * ** * * *

{

** * *

*** *

}

****

** ** ** *** * a ***** *

* *

** * *** * *

* * ******* * *** ***

* 0;

}
answered by (-64 points)
0 like 0 dislike
Hidden content!
** ******* ** **
****** * * * **




{

int i, n;
* ** **** ** input a * * ** **
** * **** * ** *
* ** ***** i++)

{
*** * == 0)
** ***

}
* **** n)
*** Not * *
if(n ** *
** ** ****** Not *** *

else
**** ** Is * * ** * *
* ** * ** ** ***
** 0;

}
answered by (-30 points)
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.69.17.59
©2016-2025

Related questions

0 like 0 dislike
23 answers
[Exercise] Coding (C) - asked Oct 13, 2016 in 作業 by Shun-Po (18k points)
ID: 13528 - Available when: Unlimited - Due to: Unlimited
| 3.1k views
0 like 0 dislike
45 answers
[Exercise] Coding (C) - asked Oct 13, 2016 in 作業 by Shun-Po (18k points)
ID: 13501 - Available when: Unlimited - Due to: Unlimited
| 5.2k views
0 like 0 dislike
26 answers
[Exercise] Coding (C) - asked Nov 3, 2016 in 作業 by Shun-Po (18k points)
ID: 16957 - Available when: Unlimited - Due to: Unlimited
| 3.4k views
0 like 0 dislike
37 answers
[Exercise] Coding (C) - asked Oct 20, 2016 in 作業 by Shun-Po (18k points)
ID: 14579 - Available when: Unlimited - Due to: Unlimited
| 4.1k views
0 like 0 dislike
73 answers
[Exercise] Coding (C) - asked Sep 29, 2016 in 作業 by Shun-Po (18k points)
ID: 11603 - Available when: Unlimited - Due to: Unlimited
| 7.5k views
12,783 questions
183,442 answers
172,219 comments
4,824 users