1-11 Exercise 3: Prefix of a string

0 like 0 dislike
9k 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 | 9k 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:108.162.241.32
©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 | 13.1k 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 | 8.8k 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 | 12k views
12,783 questions
183,442 answers
172,219 comments
4,824 users