Final Exam 2 (20%)

1 like 0 dislike
18.1k views

A string p is a prefix of a string s if the leading characters of s are identical to p. For example, "abc" is a prefix of "abcde". Develop a function prefix that checks if a C string p is a prefix of another C string s.

p是s的前綴若s開頭的一段字串等於p。例如，"abc"是"abcde"的前綴。寫一個程式 判斷字串p是否字串s的前綴。

Example input 1:

abc
abcde

Example output 1:

abc is a prefix of abcde

 

Example input 2:

bc
abcde

Example output 2:

bc is not a prefix of abcde

 

[Exam] asked in Final Exam
ID: 42299 - Available when: 2018-01-17 14:00 - Due to: Unlimited
retagged by | 18.1k views

37 Answers

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

int prefix(char a[], char b[]){
int i, j,n;
int cnt=0;

n=  * *  *  ****

*  *  ** ****    **** **  **  ** ******
** **  * *    ******* **     ****** == b[i]){
      ** ***  *** **  ** ** * * * *  ** * **  *    *** **    
*  **          *  **  *** * **

 ***    ****   *** *
if (cnt == n){
** * * *  *  *   *   **** *  **     *  * *** **  **  * 1;
   ** * * ** * *  ***   ** *  *** ** **   * ** 
  ** *  * * ****     *** ** ** 
 ***      **  ** *   ***  *  * * * *   * **  *  **   ***    0;

}

int main()
{
** *  *  *  *  *   *  s1[100], s2[100];
 ***  ***** **  *** ** i,j;

****  *   *     * *  *    ***  ***** *  s1);
***  * ****  ** ** * * **   *****    *    s2);
** *  *   *  ** *   *   (prefix(s1, s2)){

* * *         ***  * *** * * ** * *** * **** ** ** *  * **** is a prefix of %s", s1,s2);
*  * **    ***   * **  *  ****** *** * * *  * * *
*    * * * **   *   **   *  *  *** * **  * **    ***
***** **** *** *  *   ***    ***  *** *   *    *  ****** *    **  **   **   *****   is not a prefix of %s", s1,s2);



}
answered by (323 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include <stdio.h>
#include <string.h>

int main(){
      *   ****     **** ****** c;
  **   * *  *  **   **   ** a[100],b[100];
*  * **   * *** *  **** *  *     *** **     * %s",a,b);
 ****   * *****  *      * * * ** **    ***  ** **
**   * **** * * *  *      * ****** ***** *   ********  *     0;
 ** *********** ** ***    ***   ** ***    * %d",strlen(a),strlen(b));
* * ***   *   *  ***       **** * * ** *  *  ***  * ****
  **  ****  **  *   ** ***  *  ***   *   * *  ** *  ** ** * **  ** * *** * * **   *  * *
 *   *  *** *  ****   * * *  *  **   * **  ***       *  *** *  ****  ** ***** *  ***  * **   * **   **  * * * ** * *  ***  *  is not a prefix of %s",a,b);
 * *  *  **** *  ***  **** **     * **  * * ** ***   ** * ** **   *   **  * *   *   * *  * *    ***  
*     ***  ** *  ** *** ** * ** * ** ***   *****  ******   * *   *  **  ****  **** ***
**  **  *****  *  **** *****   ***     *      ** *    ** *  ***** *   * * *   * * **  if(c==strlen(a)-1)
  **** **  * * *  **   *  **  * * ** *****   * *  *  ***  ****    ** *  ** * *     * ******        **     ***   * is a prefix of %s",a,b);
    }
*  ***  *** *   * **** * * **     * 0;
}
answered by (-498 points)
edited by
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
commented by (4.3k points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include <stdio.h>
#include <string.h>
int main()
{
 **     *  ** *  *    *     n,count;
* *** * ** * ** *  *** * *  *    **         ***   * *
 * *********  *   **   *  *     * %s",a,b);
 **  *  ***** * ** ***** *** * 

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

*  * **** **    *  * ** ** (strcmp(a,c)==0)
 *  *  ** ** ***  * ***  *    **
*  **   **   ****** * **   ****** *  **  * *  * **   *    ** *    ** *** **   is a prefix of %s",a,b);
   * * *** *  *** *** ** * *
*  * *  * *** *   **   ** *   
  * **   ** *  * *   * *** *
 **  * ** *  *****     ** *    *   **** ***  * ** *    ****** * * *** is not a prefix of %s",a,b);
*  *  *  * ** **       * ** 
  ******    **       *   *   ** * 0;
}
answered by (-284 points)
edited by
0 0
prog.c: In function 'main':
prog.c:8:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s %s",&prefix,&word);
             ^
prog.c:8:16: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[100]' [-Wformat=]
     scanf("%s %s",&prefix,&word);
                ^
prog.c:10:15: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     for(i=0;i<strlen(prefix);++i)
               ^~~~~~
prog.c:10:15: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:10:15: note: include '<string.h>' or provide a declaration of 'strlen'
prog.c:18:6: error: expected '(' before 'printf'
      printf("%s is a prefix of %s",prefix,word);
      ^~~~~~
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include<stdio.h>
#include<string.h>
int main()
{
****  *  ****  * * ****   **     * a[100],b[100];
**** *   * *****   ******  ** * *  **    ** * 
    int l1,l2;
    ** ** *  *      * *** ** *   
****** *   *    ***   *  *** *** *
* **  *  *   *   ****  ****  ****  * 
 **     *  **      ** * ** ** * ***    ***  * ***  ****** ***  **   is not a prefix of %s",a,b);

    }
* **   *  ** * **     *  *** *  if(l1<=l2){
* *** *   * ** *  ***         ** *** * *** *  ** * * prefix=1;
** *  ****  **    ***** * ** * * * * * *  ** **  * ** i=0;
*    *  ***   ** *  **  *       **  *** **   *  *     *   ** *       *   * * *
 *** ***  * *  * ***     ***** ***** *   * **   ****     *  ** *  * * * **** *  (a[i]!=b[i]){
*** ***     **** * *** * ***    ** *  **   ** * *   ** * ******** * ** ***   *    * * *  **     ****** *** **** *  ** 
   ****  * *** *  **    * ***  *   *  *  * **   *  *   ***       * **** *  *  **  * *  *** * *  * ******   
* **  *   **   *  *   ** ****  *      ******** *  * * ***  *     *** *   *** 


***    *****       **    * *** * ** * ** **    **   * * *
* * ** ***** * ****  ***** ** *   *   *********    *  ****** * **   * 
 *  *****  * **   *  *    **  * *  * *** ** **  **** **  *  ***   ** * * **   *** * * * * **  *    is not a prefix of %s",a,b);
* ***  **    * **   *  *   ** *     **** *   *** ** 
**  *   * * *      **    * * *   ****  * *  *  *  **
  * *  ** * *  **   * *      ** * *  * * * **   *  ***    *   *** *  **** * is a prefix of %s",a,b);


    }


}
answered by (-329 points)
0 0
prog.c: In function 'main':
prog.c:5:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
             ^
prog.c:5:15: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
               ^
prog.c:7:8: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     l1=strlen(a);
        ^~~~~~
prog.c:7:8: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:7:8: note: include '<string.h>' or provide a declaration of 'strlen'
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:6:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
             ^
prog.c:6:15: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
               ^
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include<stdio.h>
 * ** * *   ***** ***  * **
int main(void)
{

 *   ** ****   * *  **  **  **  pre[100];
 * *  *  * * ** *  *****  * *  word[100];
*  *** *   ****   ** *       *  * * *  %s",pre,word);
  *      *   **    **  ********   *     **
********        **   *  ****  ***   *      * ** 

*** ****   **  ** ** *   *****  *  i;
 **   *  **** **   *** ***  *****    * ** * **  * *
        * ** * * **  *  **
** *     ***** *    * * ** ** ****    *  **   ****     **     
    *  * **    ** * *   ******** ***  **  *  * * *
 *  ** *   * ** * *****    * **    ***** ** *  * ******  *** *   *   *** *   * *    *  *      is not a prefix of %s",pre,word);
******  * *  ** *  *  * *      * *    ** *     *  ***  *   * * * ***  * * *  *      * 0;
  **** *  ** *  *  ***** ** *   ** ** *  **** ** **   * * * 

*** *** ***** **    * ** **** * *
printf("%s is a prefix of %s",pre,word);
return 0;
}
answered by (-249 points)
0 0
prog.c: In function 'main':
prog.c:8:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s",&pre);
             ^
prog.c:9:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s",&word);
             ^
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:8:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s",&pre);
             ^
prog.c:9:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s",&word);
             ^
commented by (4.3k points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main ()
{
*  **   * ****    *  ****  * ** pre [100],a[100];
**  * * ** *  * ** **** * n ,i;
  **   ** ** ** ***   ** *  ****       * *
  *  * *  ****    **    *  * ****   *** **
**    ***       *  *** *    * *** ****    * *** 
  ** ***   *  **   *** *  
 ** *      * **   *   *** *       *    * * *  *   *  *   (n=0;n<strlen(pre);n++)
 * ***** *****   * *        **  * **  ***   *****  * *
 **  * **  * ***  * ****** *  *   **   *    ***   ****    * ***  *  * *  **    ***    **  ***  (pre[n]==a[n])
  **  *** * *     *   ******** **  *        * * *** ** *   ** ****       *  * ****   **    is a prefix of %s",pre,a);
** ****  *  *** * * **  ***  *  **********  *  * * * *  ** *  * *    ******* ** ** *    *  
* *** **** ***   *   *   *** *   *  ***** * * **   *    *  ***  ****   *   * *   ***** *  ********   ****   **  **  is not a prefix of %s",pre,a);return 0;
****** *   * ***  ** * ** *
****  ** ** ***** **  ****   **  * ** ************   *   *** ** ***  ** ** ** ***  

  * ****  **  ** * *  * *  *  * * 0;
}
answered by (-32 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include <stdio.h>
#include * ** *   **  **
#include ** * *  * **  

int main()
{
*    *  ********              a[100];

  *   * ****  *****   **  * b[100];

   ******* *  *** *** **   * * *  *****  %s", a, b);

 * ***   **  *** **** ** **     len_a = strlen(a);

* * **** *   *  **** ** * i = 0;

***  ***   *  *  ****  *** * ** flag = 1;

  *****  ** *    **     * **  **  * = 0; i < len_a; i++)
***  *** **  **  ***  *  
    *   * *  **  **  * *  **   *    ***  *** *  **** ***  ** ** != b[i])
  *  * * ***  * * * ***     ***   ** * * **    *   * *  
*  *     ****** **** **   *   * *  *       *** ****   *  **** ** **** * *   * * ** = 0;
*  *********     * *****       *** **     ** *     ****  
  * *  *   **** **   * * 

*  *    *********  *  ***** ** *  == 0)
 * ***   *  * *  * **  **
       ***  *  ** ** *  * *** * *    ****     * * ***  ******  *  *** * *** * is not a prefix of %s", a, b);
* ****   *  * * ** * *   ****
*    *  * *  *  **   **** **  ** 
     **  ***     * * ***** * * 
** ****  *     * * * *    *  *  **    **  *** ******    *      **    ** is a prefix of %s", a, b);
***   ** * * * ***         *
    *  **   * **** ***  *   ** 0;
}
answered by (-285 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include<stdio.h>
  *** * *** *****  *  *
int main()
{
* *  * * *** * *   **   *** * i,n;
* *    *       **** ** ****  * p[100],s[100],a[100]={};
 **        ** *** **** * *** * * * ** * %s",p,s);
*****   * *  *  * ***  ** *   **  * *
 *   *** **** *******  ** ** * * * **  **
       *   ** * * ** ** * ** **   **  ******* *  * **
 **   ***  ***  **   *****   *   **** * 
*        * *    * *         *****  **  **  ***    * ***    * * * * *** is a prefix of %s",p,s);
* * ******   * *   *  * **  *
 *** *    **    * *** *****
*  ****  **    * **     **** *   * *  * **  *** * ** *    * ** is not a prefix of %s",p,s);
* ****  *****       *      *
** * *  *    ***** *** ** *   * * *  *  * ****** * * ***     
 **   ***     **** * **   *  ** 0;
}
answered by (54 points)
edited by
0 0
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include<stdio.h>
#include<string.h>

int main()
{
    int i;
    char a[100];
    char b[100];
 ****   *      *   * *  ** * *** ****   * **  ** **    
    scanf("%s",b);
    for(i=0;i<strlen(a);i++)
** ***  **  **  * *  *  * ***  **   ** *    **    **
    ** **      ****  *  *** ***  *** ** * ***  **   ***  * * * ** * ** *   *******     ***  != b[i])
 *  *    ****  *  ****** * ** *       * *  *****     * *   *    *   **    * *    **   ** ** **    *    ** 
* ***   * * * ***         * ****  **  *   ** ******* *  *** **  *** **   ****  *     *  * ****   ** **  *  *  * * ** **      * * ** *  *** is not a prefix of %s",a,b);
 ** ****   *  * * *   ** **** *  *** *  * ** **     ** * *     * ***  * *    ** ** * **    ** *  *   ****  ** *    *** *      *   ***   * * 
    **** *** **  * *  *** ** **      ***** **  ***  *** * *      *       *   **  * *  *** ***** * **** 
***    **** ***  **   *** **    *    **     **  **   ***** ** ****   * *****    ** *  * *  *  * == b[strlen(a)-1])
** * **** **  **   * *  *  * *  ** **** *  *    *  ** *   **** *   *  *** *       *  * * *   ** * *  
 ** *  ***** *    * * ** ** *****  *    **** * ******    * ******* ** ** ***** ** ** * * * * * ** *   ***  *   *   ***  *******    * *** ** ** *****   is a prefix of %s",a,b);
      * ** ** *   ** *  *   **  ***    *  *** * ***      * ***  * **   *   ** ** ** *      * * **** **  **** * ** * **    *** *  ** ***
* ** *   *     **   *      *** *** ** *    * ***** * ** *    ***** *   ***** * *   *** **** ** **    * *   * 
 *    * *   *   *  * **   **** *** **   * * * ** *   **  * 
}
answered by (-301 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define n 100

int aa(char a[],char b[]){
   *  **   ***** * ** ** **  * ** *  i;
 *** *   * *****  **  *   *   ** (a[0]!=b[0]){
* *****    *    ** *  *     *  * ** *****   * ** ** **  0;
 * **  *  **  ** **   ***     * 
  * *   *****  ********  * *** *     *  *  *  *    ** * *
  *  ** ** ****** * * *  *      * * *   **     * * ****   * ** *     a[i]==b[i])
** **  * ***  **   ** * * ** ** *  * * * * ** **  * ** * 
*  **   ***** **** **** * * *** ** **** * ***  ** *   **   * * * *  **  *    * * 1;
   *  * **  **   *  **  **  * * **** *** ** **     **  **  ** ** **  * **  * **   ** 
* * *   * ** * *** *   ***** *** *  *   *       *
*   *******  *****    ***  * ****  * 
*  *   ** * ***    * **  **   ** * 0;

}

int main(){
  *  ***  * ***  *    * ***** * c[n],d[n],e[n];
  ** *   ***  *** ***** *** *** ** i;
 **** *  * *   ** **        ** **     %s",c,d);

  *   *  ****   **  *   *  *  *
 ** *   *  *******  *    *   *  ******* **     *********   ** * * is a prefix of %s",c,d);

  ********* **  * **** *  * *****  
   * *  *****  * * *  *  * *   ****  *** ***   * * * *  *  ** ****  ** is not a prefix of %s",c,d);


}
answered by (-32 points)
edited by
0 0
Case 0: Wrong output
Case 1: Correct output
Case 2: Wrong output
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
commented by (4.3k points)
Page:
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:162.159.115.10
©2016-2026

Related questions

1 like 0 dislike
37 answers
Final Exam 5 (20%)
[Exam] asked Jan 16, 2018 in Final Exam
ID: 42302 - Available when: 2018-01-17 14:00 - Due to: Unlimited | 16.7k views
2 like 0 dislike
31 answers
Final Exam 4 (20%)
[Exam] asked Jan 16, 2018 in Final Exam
ID: 42301 - Available when: 2018-01-17 14:00 - Due to: Unlimited | 15.6k views
1 like 0 dislike
32 answers
Final Exam 3 (20%)
[Exam] asked Jan 16, 2018 in Final Exam
ID: 42300 - Available when: 2018-01-17 14:00 - Due to: Unlimited | 19.4k views
2 like 0 dislike
30 answers
Final Exam 1 (20%)
[Exam] asked Jan 16, 2018 in Final Exam
ID: 42298 - Available when: 2018-01-17 14:00 - Due to: Unlimited | 13.5k views
0 like 0 dislike
4 answers
[Makeup] Final Exam 2 (20%)
[Exam] asked Jan 19, 2018 in Final Exam
ID: 43460 - Available when: 2018-01-20 09:00 - Due to: Unlimited | 3.4k views
12,783 questions
183,442 answers
172,219 comments
4,824 users