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:172.71.254.197
©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