1-11 Exercise 3: Prefix of a string

0 like 0 dislike
1.9k 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 | 1.9k 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:172.70.127.9
©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 | 2.5k 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 | 1.7k 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 | 2.2k views
12,783 questions
183,443 answers
172,219 comments
4,824 users