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:172.69.59.199
©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