1-11 Exercise 3: Prefix of a string

0 like 0 dislike
4.3k 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 | 4.3k 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:172.71.254.115
©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 | 5.7k 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 | 4k 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 | 5.3k views
12,783 questions
183,443 answers
172,219 comments
4,824 users