1-11 Exercise 3: Prefix of a string

0 like 0 dislike
4.3k 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

 

[Exercise] Coding (C) - asked in Chapter 13: Strings by (12.1k points)
ID: 41439 - Available when: Unlimited - Due to: Unlimited
edited by | 4.3k views
0 0
12345
commented by (-329 points)

27 Answers

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

char prefix(char s1[], char s2[])
 {
 int i;
 int length;
 int count=0;
 
   ****** ** ** * **      *
 
* ***  ***    * ************ * *   * *** * *  ** ** ** *
*    **** * **** ** *   **   ** 
* ***     *** ** * *  * *  ***     **    ** **  *   == s2[i])
*** ** * * *  **  * **  **    ** *     ** ****    * 
 *  *** **** *  **      * *     ****   **  **  *  * *  *     *      * * ** **    *  *  
  *  * *  *  *   *     * * *** * ** ** ** * * **  *  
 
  * **  *  ***   *  ***  *  * * *  ***
 
* *** ** * **  ***** **** ***   **  * * == length)
  ** *** * ** **  ***   **** **
  * *    **   * ** **   * ***  * * * ** *  *   * *   * *  ** ** ** *   *    is a prefix of %s",s1,s2);
 ***  ***     ** **   *  *******  *
 
**** **    ***  *  * ***** *** **  *  
   ***   **     *   * *  ** *
****   ***  * **  *  ** *  **  * * *   * *  *  * *   *** ** *** *** *  *  is not a prefix of %s",s1,s2);
    *  ** *  **    ** *     * *   **   * *
 return 0;
* **  *  ****  *  ****** ***    ** 
 }

int main(void)
{
 *** ** **  *** *   **  *    *   s1[100];
*  * * **    *   * ** ***  * s2[100];
   *** * **** *  *    ***  *****  i,j;
**    ***    ****  * * **  * 
      *****   ****      ** *   * *  * ***  * s1);
**     **** ***  *  **  *   ***** ****** s2);
     *   *** *** * *  *  * 
****** **      * *  **    *  *** *   
  ** **** **   *    * *  * 
 *****  *   **     *     **  ***  0;
}
answered by (-193 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  *   *    ** *
#include *** ***   *  ** 

int prefix (char st1[],char st2[]){
     * ***   **** * ***  * ** ***  len=0, i, cnt=0;
  * ** *   *  *   ********
* ** ** *  ** *** * *** *** *** = (unsigned)strlen(st1);
** ***** *********  **  ** ***
**  *  **  **  * **    ** (i=0;i<len;i++)
*  ****    * **** **  **** * * 
**    * ** **  ** (st1[i]==st2[i]){
   **      * **   **** * **  ***     ** *        *    *   *** **  ***  *  * *    *
**** ** **  **   * *** *   * * *** ***** * ****  ***  * *** *
* ** ** * ** ** ** *  *   *  *
**    **   * *    *    *   (cnt == len){
** *** *  *   *       * * ** * *** ** ***   ********  ** *** 1;
  *    *  *  *** *       **
 * *        * *    *  **
*   * **   * * * * *   * *** ***  * 0;
* * *** *  ****** *  *  ** *    *
}

int main(void) {
  *** **  **** ***** * ******  st1[256];
*** *** **    *  * ** ***** * * st2[256];
** * * ***   * **  ***  **** * *  * * ***** ** st1);
    *** *      *****  ******    * **  ** * st2);

 ***** * ********  *** ** * (prefix(st1,st2)){
**  *** * *****  *   *  * *  * * ****  **    *****   *  * *      *  is a prefix of %s", st1, st2);
*   *   ****** **  * **   * 
 ** *  * ** *      ***  ******  * 
** ** ** * *   *   ** ** ***   ** ********   * * *  **  **  *  * **  *  is not a prefix of %s", st1, st2);

* *   * * *   **   * **  *** * ***  0;
}
answered by (323 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,j;
    char a[100], b[100];
*   *     **    *** * ***** *****  ****  ***  *  *   
    scanf("%s",b);
    j=strlen(a);
    for(i=0;i<j;i++)
           ** *** *  **    *   *** ******  ****   *  ***
  *     * * ** **  **  *   * **  ** **  **     *    **  *  ** *       ** * *    *****
*** * *       ***   * *     * ** ***** **   *  **  * *  * ***  * * ***    * ** ** ***** ****  *   *** *     *
***    ***   ******** ** **  **  *    ** *   **** * **  ****  * *    ***  ****  ** * ** ****    **  ** * * **  * **  *** ** *  * *          * *   * is not a prefix of %s",a,b);
* * * * *  ** ** **   ***** **  * **** * ** **  *    * *  **** **  * * *     *  *  **  * ** ** *  *  ***  * * ***** * *  ** **** * * *    
   *   ** **** **    ***       *  * ** *     *  *  ****** ** ** **  *** ***  ***  **     *   ***   ** * * 
 ** * ** **   * ** ***  ***    ****         * ***** *****  *  ** *  ** *  ***     ***     
   *    **     * *  *  * ****  ***** ***  **  ** *  * **** * *    *** * *   * * *   *  ** ******* **   ***  *** **   
***  ****      ***  * * *    ** * *** *** *   ** **     *   * *    ***  *     *  **   *  **** * * *** ***** * *       *** ** * ** **  * * *  * 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 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include<stdio.h>
#include<string.h>

int main(void)
{
    char pre[100], str[100];
    int i;
     *    * * * * ** * *  * *  *  * * * *  ***   ** ****
  **      ** *  *****  * ****** *  *** *** **   

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

   *      *  *****   * * ** * 0;
}
answered by (-281 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: Correct output
Case 2: Correct output
commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
commented by (4.3k points)
0 0
-----------Re-judge-----------
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 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()
{
       *** ***  ****  * a[100];

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

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

  * *** ** **      * * ** ** *  *** prefix = 1;

*         * ** **  * * ****  * **  ******** *  * *** *   a, b);

 * * * **  *** *  **     len = strlen(a);

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

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

 **     **** ***    *  * *** * ***   ***    ** ** *   *  *   *  *** *****  * *  * **  
    *  * * * *** **   ** * ** ** * *  ** * *   **  ****   *
* *  ***  **  * ** *  
 * * *  **  **  * **** * *   * *  * == 1)
**     ***   * *  *  * * *
*  ** ***  * ****  ** *   * *****       ** ******* **   **   ** **  **    is a prefix of %s", a, b);

*    ** **** ****** *   * * * **
}
answered by (-285 points)
edited by
0 0
Case 0: Correct output
Case 1: Correct 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 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include ********* * *** 
#include    * * *****    

int main() 
{ 
***  ** ******* *****   ** *   a[100],b[100]; 
   * ** ** ******     ***   **  i,j,prefix = 1; 
*      *  ** ** * ******  ***    *   * *** %s",a,b); 
 *  **  *** ******   ** * *    * len = strlen(a); 
*  * ** * ***   * ****   ** = 0 ; i < len ; i++) 
 *** **   ** *  * **  **  **       
* ** *** * ** *  ** ***    *   *  *** *  * * ** *** != b[i]) 
** *      *** ** *  * **** * ***  *     **  ****    *  
  ** ** *  **   ** *    * **  * **  ** ****   *     **  **  *   ***  **  * *   * *** = 0; 
  *** ** ** *   ****   * *     *  *  * **  **  **     ***   **   ** * * ** *** *****   *  *  *  *  is not a prefix of %s",a,b); 
*  **  *   **       *     * *** *** *   ** * **  * ******* *** *    *   **   *** **  
 *    *****   *  *** **  *   *** * ***  ** *   *   * 

*  *** ******      **  *** 
  ** *******  ***  *  *     **** == 1) 
 *  * *  * **  * *       * **   *   *   ***   * **   *** **  ** is a prefix of %s",a,b); 

 
   * ** ** * * *******  *     0; 
}
answered by (-127 points)
edited by
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:8:5: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
     scanf("%s %s",a,b);
     ^~~~~
prog.c:8:5: warning: incompatible implicit declaration of built-in function 'scanf'
prog.c:8:5: note: include '<stdio.h>' or provide a declaration of 'scanf'
prog.c:15:13: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
             printf("%s is not a prefix of %s",a,b);
             ^~~~~~
prog.c:15:13: warning: incompatible implicit declaration of built-in function 'printf'
prog.c:15:13: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:21:9: warning: incompatible implicit declaration of built-in function 'printf'
         printf("%s is a prefix of %s",a,b);
         ^~~~~~
prog.c:21:9: note: include '<stdio.h>' or provide a declaration of 'printf'
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:9:11: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     int n=strlen(a);
           ^~~~~~
prog.c:9:11: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:9:11: note: include '<string.h>' or provide a declaration of 'strlen'
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:9:11: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     int n=strlen(a);
           ^~~~~~
prog.c:9:11: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:9:11: note: include '<string.h>' or provide a declaration of 'strlen'
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:8:5: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
     scanf("%s %s",a,b);
     ^~~~~
prog.c:8:5: warning: incompatible implicit declaration of built-in function 'scanf'
prog.c:8:5: note: include '<stdio.h>' or provide a declaration of 'scanf'
prog.c:15:13: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
             printf("%s is not a prefix of %s",a,b);
             ^~~~~~
prog.c:15:13: warning: incompatible implicit declaration of built-in function 'printf'
prog.c:15:13: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:21:9: warning: incompatible implicit declaration of built-in function 'printf'
         printf("%s is a prefix of %s",a,b);
         ^~~~~~
prog.c:21:9: note: include '<stdio.h>' or provide a declaration of 'printf'
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include <stdio.h>
#include * ** *  ***  **  
#include *    * * **   * **   *

int main()
{
*** **  * *     ** **   ** * a[100],b[100];
       ****  *  * ***  ****   i,j,prefix = 1;
 *   *   ** *  *     * *  *  *     * ** %s",a,b);
       **** *** *** ** **   *    len = strlen(a);
*  *** ** * * ** ** *** * *  **   = 0 ; i < len ; i++)
* ****    *  ** *    ** *
  *****  *  ** * * **  *      ***  ***  ** ***  * ******  *  *   != b[i])
*   *   * *  *   **  *****    *  ****  ** ** *  * * **
 * **     * * **  * ** ***  *    **    * * ** ** *  ****  **  ** * *  *** ***  ** *  **** **   = 0;
**  **     **      * * * * ***  ***         *       ****    * * *******  **  *    * * ******* *        *  is not a prefix of %s",a,b);
  *   **     * * *  *    *     * * *  * *   ***  **  * *   **  ********* ****   * * ***  *
   ***   ** **  ****     *  *** * *   **    ***     ** 

***   * * *  *   **  *  *** **
  ******* ****  *   ** ***   * *** == 1)
 **    *   *****  ***  *     *** *  * *  ***    *   ** ***   *   is a prefix of %s",a,b);


  **  * *       ****   **  *   0;
}
answered by (-255 points)
edited by
0 0
Case 0: Correct output
Case 1: Correct 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 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include  *** ** *   ** *
#include *  *******  **

int prefix(const char *pre, const char *str)
{

  * ** *******    **  * ** * *       *  ***** **  * **
  **** *********   * **   *  **  *   *  * ***** **** ***  **      0;
 **    * *  *   **    * *** **    * **    * * ***   
** * * *   **  ***   ** ***     **   *  ****  * **** 1;
 *  *   ** *** * * ***    ** return 0;


}

int main()
{
 * * *******    * **  *** *  pre[100],str[100];
*       ** *  *   ****
*  ****  * * *** * ** * * **** ** ** ***** * *  ** 
* * ** * **      **  *** *** *  *   *   * 
****** *  * **  * ** * * **  * **  *** ***    * * *  * **** * * ** is a prefix of %s",pre,str);
   **      *  ***      ** * **** 
  *    *  * * *   ***  **    **   ** *    ***      **** * * *  *  *  *  is not a prefix of %s",pre,str);
 ** **  * *****  *** * * *   * * 0;
}
answered by (-196 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 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
commented by (4.3k points)
0 0
-----------Re-judge-----------
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 perfix(char *a,char *b){
* **** ** ***** * ***    **  ** *  c;
  * **  * *   **    *  * *** *    *   *  * *****  
*   *  * * *  *    *  * * * * **  **   *   *    * **    0;
  *   * * ** * ** *  ******
 * *** ** * * **    * ***  * * 
 **  *  * * ***    ** ***     *  *  **  *   *   * * *** *   ****** ** **  * ** * *  of a string
 *****      * ** ***    ** *   ***** * *   *** ****  * **   *    * *****    ***       **
*  * * *****  *     *   * *** **   ** ** **  * *  *   ***  * * ***     ** **   * **** *** *** ** * *   * *  0;
*  ** ****   *** *   **       ** * *  *   *   **     *   **
 ***  ****  * *   *** ***     ***** *** * ****  ** *   1;
    }
}

int main(){
 ** **  *     **  *  *   *   *  a[100],b[100];
 *** *   **   * *******   * ** *** **** * *  %s",a,b);
* *   ***   ** *  ****  *******   ** *  
 * ***    * **   ** ** * *  ****  ** * * * *** * **     ** *   * *  is a prefix of %s",a,b);
**   *  **    *** * *** ****   * 
***** *  * ***      *   ** ** *  **   * ** * **  *   * ** * *  * * is not a prefix of %s",a,b);
**  *  * **    * **       0;
}
answered by (-498 points)
edited by
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct 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()
{
  *  * **    * * * *  * * *  * * *   p[100],s[100],a[100]={};
*** *     * ***   *  *   *   t;
  * *  *   **  **  ** ****       ***
*       **** ** ***  **  *  *  *   ** 
  *  *    *** **  ** * * ** *      **  * %s",p,s);
 * ** ** ** * ****** * * * * ** *
****  * ***  *  *****     ** * 
*** *** * * *     * *  * * **    ********
* *   *  **  * ***    * **   *******   *
* ** * * **       *  * ****  * *  ** *
 *  * * * *******  * ** ******** *   *****  **   *      ***  is a prefix of %s",p,s);
   **  *   *** * ** **     *
** ***  ** *       * *  *  ** *   * 
 * *  *  *** * *  *  ***   *  ******   *****  * *** ***    is not a prefix of %s",p,s);
 *  *    * * *      * *** 
  * ** **  **   **      * *   *  0;
}
answered by (54 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct 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:172.71.254.39
©2016-2024

Related questions

0 like 0 dislike
57 answers
1-11 Exercise 1: UPPER and lower letters
[Exercise] Coding (C) - asked Jan 11, 2018 in Chapter 13: Strings
ID: 41431 - Available when: Unlimited - Due to: Unlimited | 5.7k views
0 like 0 dislike
29 answers
1-11 Exercise 2: Reverse a sentence
[Exercise] Coding (C) - asked Jan 11, 2018 in Chapter 13: Strings by thopd (12.1k points)
ID: 41436 - Available when: Unlimited - Due to: Unlimited | 4k views
0 like 0 dislike
53 answers
1-4 Exercise 3: String details
[Exercise] Coding (C) - asked Jan 4, 2018 in Chapter 13: Strings by semicolon (5.2k points)
ID: 40715 - Available when: 2018-01-04 18:00 - Due to: Unlimited | 5.3k views
12,783 questions
183,443 answers
172,219 comments
4,824 users