Final Exam 2 (20%)

1 like 0 dislike
8.3k 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 | 8.3k 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:172.70.126.80
©2016-2025

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 | 8.6k 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 | 7.5k 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 | 8.7k 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 | 6.7k 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 | 1.6k views
12,783 questions
183,442 answers
172,219 comments
4,824 users