1-11 Exercise 3: Prefix of a string

0 like 0 dislike
7k 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 | 7k 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:172.70.127.201
©2016-2025

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 | 10.1k 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 | 6.6k 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 | 9.2k views
12,783 questions
183,442 answers
172,219 comments
4,824 users