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:172.69.58.179
©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