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:172.69.7.141
©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