Final Exam 2 (20%)

1 like 0 dislike
16.1k 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 | 16.1k 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:104.23.197.65
©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 | 14.7k 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 | 14.1k 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 | 17.1k 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 | 12k 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 | 3.1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users