1-11 Exercise 3: Prefix of a string

0 like 0 dislike
12.8k 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 | 12.8k views
0 0
12345
commented by (-329 points)

27 Answers

0 like 0 dislike 
Hidden content!
#include <stdio.h>
#include <string.h>

int main()
{
 *    **     * ********* ** *****  n[999],str[999];
 * ** ****** **   **** *  ** ** *****    *  ** n);
**     *  **   *   ****** *  ** ** *  ** *  *  *  str);
**** **  *  * *         *   *  *****     *    **   * *    **  *   * *    *
***      * *****    *   ** *  ** **  * *      *** * * **  *  **    *  **  *  **  ** *  **  *   *  is a prefix of %s",n,str);
*** ** * *  *   * ** *   *** **   ***   **   **** **** *  
  *   ** ** * ** *   ***** ** ** * *   *   ***  *    * ** * ****
* * *** * * *  * * * *    *       *  **    *  *  *****   **   *****  *** *** **     *          *    is not a prefix of %s",n,str);
   * **    * *  *  *  * * *   *  * **   * * ***   *    *
* *****   ** *****  **    * 0;
}
answered by (-249 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
-----------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
prog.c: In function 'main':
prog.c:9:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t {aka long unsigned int}' [-Wformat=]
     printf("%d",strlen(n));
              ^
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:9:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t {aka long unsigned int}' [-Wformat=]
     printf("%d",strlen(n));
              ^
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!
*   ** ** * **
 * * ** *       * * * 

int main()
{
    *  ** ** *  **      * i,plen;
   **  *     ********  *   * *  * * * *   
** ***    * *   *  ***** * ** *  * * *  **  *** *   * 
          *****    ***  * *  *  **   *  *  *   **

*      * ***  *  ** * ** **  * *  * *

  *  ** ** *  *   ** ***    **    **  * * *  * i++)
 ** * * *   **  **      *

     * *  **** 
* **  **
* **  *  *  ***  is not a prefix of *  ** ***  
return 0;

 }


if (i==plen-1)
 * * * * *   ** is a prefix of * ***  ***    

* ***    ***   * * *** *     


}
answered by (-336 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 main() {
**  * ** * *** ** * *  *   ** *** ** p[1000],s[1000];
** ****  **        *   *  ** ***   i=0,re=0,len;

*    * *** *  *  *   ****  * ** ***   *  ** *  p);
*  *     **** *** *  * **  *** ***  s);
  *    ** * ** ***     * * * *  *** 

  **  *  ***  * *  ******   ****     ** * * * {
**  *** **  ** ***   *  *      *  *  *  **   * ****  *  * * * ** {
 * *  *  * ***  **   ** * *     * * *      * **   ** ****   * *** **** *  *  *** 
 *   **  *** **      *** *** ** **      *   ***    ***** **    * **** *   * *   **    ***     *
  * *  *   ***  ***  ****  *  *    *  *  *   *   
  *  * *  ** **   ** *   *
***  *** ** *   *   ** **   {
**** * * * *  *** *    *   ** **  * *** *  ***  *  *  ** *** * ***  ***  ** is a prefix of %s", p, s);
  ** **** ********  *   ****  ** *  
* * *** *** *** **  *    ** if(re==1) {
 **    *   * **  ** ** * *    ***   *   **    *****  ***   *  ***   is not a prefix of %s", p, s);
    }
}
answered by (-120 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 main()
{

* * * *  ***** * **    ******  a[100],b[100],c[100];
* ** ****       * **** * * ** * ***** * *** ** *  
    int l1,l2,i=0;
  *       * ** *    **  ***** * 
 * * * *****   **    *        **  
 *  ***  *     ****   ******* *    **  ** * 
* *****    **     **    * **   * *  *** *** ** **   *    * ******* * * ** is not a prefix of %s",a,b);
    }
** ***   *****    ** *** *** if(l1<=l2){
   * **     * * * ***** ****  *       **** ***** ** prefix = 1;
*  *  ****    * *** *   ********  ** *  ***  **  ***** **** ***   *  
 *    ****  *  * ***   ***  *  *  **      *****      * * *** * *** **** *  *    (a[i]!=b[i]){
* *  ** ** * *  ***  * ** **** ***    **  * *  *   ** *  *    ***  **      *   **** *  * * *  *   ** * * *   * * **  ****  is not a prefix of %s",a,b);
 *  * ***  * * ******* ** ****  ***     ** * *  *** ***  *   ***   ** ** * ** ***** * ********   *   *  *** ****  *     = 0;
 ****   *  * * *  **   * **  * **   **    **** *  * ***** * ** *  ***  ****** *** **** ****   * ** **** * **  ** 
 * ******  * * ** ***   * *    ** **** ****  *  * ****   ** *    * * **   ****
* * *    *    ****     *** * *****   **  ** *** *
** ** * *    * ****   *****   * *** **** *  *  * == 1){
** *  **** *  ******* * ** *  ****  *  *   ***   * * *  ****   ****    ****  ***     * *** ** * ** is a prefix of %s",a,b);
* *  **  * * **     *   ** ***     * *** * ** * *  ***** *
    }
}
answered by (-329 points)
0 0
prog.c: In function 'main':
prog.c:8:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
             ^
prog.c:8:15: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
               ^
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:7:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
             ^
prog.c:7:15: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
               ^
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 * ** * **   *** *
#include ***  ** ******** *

int main()
{
* *   ******    ** **** prefix[100];
  **** **  **** * *  ** ****     ** word[100];
  * * *  ** * ******   * *    **   ** **** ** %s", prefix, word);
 * * ** * ***  *** * **   ** ***   i;
*****  * **  ** * *** *** ** = 0; i< strlen(prefix); ++i)
*      ***** **     ***** *  
     *    ** * *     * ***** ***  **  *     *    ****  **   **     * **  *  *
**   ***   * *   * ** **    * * * ****  ***    **
** *****  *     ** * ** * ***     *   *   ** ** *  *** **  ** **  *  *  ** * *    *  *  ** * is not a prefix of %s", prefix, word);
   ***  ***** **   ***** *  ******   * * ***  **  * * * ***  ** *  * *****   * ** * * * 0;
**  ** *    *  ** * *  *******  * ***  ** *  * * * * * * 
****** *  **  **  *  * * *** 
 ** * **  ** ***      **   *   *   *   is a prefix of %s", prefix, word);
  *  ****  * **    ** **    **  0;
}
answered
edited by
0 0
prog.c: In function 'main':
prog.c:15:12: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
            ^~
prog.c:17:12: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
            ^~
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:15:12: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
            ^~
prog.c:17:12: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
            ^~
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 * * *  *   * *** 
#include ** **  ** *  *

int main(){
  * ***    * *  ***   * *  p[100],s[100];
* ** * ****** ***  ** *   * ***  **** * *  *   * * **  
 *   * ** * ***** *   *** **  * ** * bf=1;
    * ***    ** ** *  ** *  *    ** * ****     
*   * **    ******** **  **  *    *   ***   ***   *****  *** bf=0;
***  *   * * **  *  *

      *   ** * ** **** * *  * ***  *****  is a prefix of %s",p,s);
  ** *  ** *** ******   ***  *       * is not a prefix of ***  * **    * 
 *** * *  * **    * ***    *    0;
}
answered by (-116 points)
0 0
prog.c: In function 'main':
prog.c:5:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(p);
     ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
prog.c:6:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(s);
     ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
prog.c:8:19: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     for(int i=0;i<strlen(p);i++){
                   ^~~~~~
prog.c:8:19: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:8:19: note: include '<string.h>' or provide a declaration of 'strlen'
/tmp/cclwPOj6.o: In function `main':
prog.c:(.text+0x26): warning: the `gets' function is dangerous and should not be used.
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:8:19: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     for(int i=0;i<strlen(p);i++){
                   ^~~~~~
prog.c:8:19: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:8:19: note: include '<string.h>' or provide a declaration of 'strlen'
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
-----------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 main()
{
  *   *     * *    ****  **   i,count=0;
 *  *  * *       *** ***     string1[100];
**   ******  * **** *  *** **** *  string2[100];
 ***  *****       * * **  **** * **   *** **   **   * * *
*  ***  *      *   * *** * **  * *    * *    * ***    

  * * *******  * **  *   *  * *      ** **   *    
* *    ***  * *    ** *********
*    * *     * *** ***     ***  *  * *     **   **** *  * ** ***   * 
   ** ** ** **    * *      **  ** * *    * *******  **  * 
 *** **   **** ***    ***  ** * *** *        * ** *  *  *       ** *     *   *   *****
******* * *****    ****    ***   *  ***** * *  **   * * *  *
    }
  ** *       **      **   ** *  
*   *  * **  * **
* *  *  * ** ** *  *** * *    ********* *    ****  **     *  * ****  is a prefix of %s",string1,string2);
***    *    *** *  * *   **
* * ***    * *  *  * ********
*** * * *** *****     
** * *   ***  **  * * * *  **    *   *  ***  *** **  * *  is not a prefix of %s",string1,string2);
 ** * ** *  *   ***   * * * *  
         **  ***   * **   * 0;
}
answered by (-323 points)
edited by
0 0
prog.c: In function 'main':
prog.c:9:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(string1);
     ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
prog.c:10:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(string2);
     ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/tmp/ccIBxtbQ.o: In function `main':
prog.c:(.text+0x2f): warning: the `gets' function is dangerous and should not be used.
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
-----------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:104.23.197.95
©2016-2026

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 | 18.5k 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 | 12k 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 | 16.3k views
12,783 questions
183,442 answers
172,219 comments
4,824 users