1-11 Exercise 3: Prefix of a string

0 like 0 dislike
14.6k 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 | 14.6k 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 | 20.9k 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 | 13.6k 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 | 18.9k views
12,783 questions
183,442 answers
172,219 comments
4,824 users