Final Exam 2 (20%)

1 like 0 dislike
17.4k 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 | 17.4k 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:162.159.115.9
©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 | 16k 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 | 15k 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 | 18.7k 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 | 13k 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 | 3.3k views
12,783 questions
183,442 answers
172,219 comments
4,824 users