1-11 Exercise 3: Prefix of a string

0 like 0 dislike
6.2k 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 | 6.2k 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:172.70.130.195
©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 | 8.8k 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 | 5.9k 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 | 8.1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users