1-11 Exercise 3: Prefix of a string

0 like 0 dislike
12.2k 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 | 12.2k 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:162.159.115.32
©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 | 17.6k 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 | 11.6k 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 | 15.7k views
12,783 questions
183,442 answers
172,219 comments
4,824 users