Final Exam 2 (20%)

1 like 0 dislike
13.8k 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 | 13.8k 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:172.70.179.64
©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 | 13.1k 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 | 12k 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 | 14.5k 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 | 10.8k 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 | 2.7k views
12,783 questions
183,442 answers
172,219 comments
4,824 users