1-11 Exercise 3: Prefix of a string

0 like 0 dislike
2.2k 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 | 2.2k 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:172.71.254.42
©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 | 2.9k 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 | 2k 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 | 2.6k views
12,783 questions
183,443 answers
172,219 comments
4,824 users