1-11 Exercise 3: Prefix of a string

0 like 0 dislike
14.4k 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 | 14.4k 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:162.159.115.10
©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 | 20.7k 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 | 13.5k 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 | 18.6k views
12,783 questions
183,442 answers
172,219 comments
4,824 users