1-11 Exercise 3: Prefix of a string

0 like 0 dislike
13.1k 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 | 13.1k 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:104.23.197.65
©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 | 19.2k 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 | 12.5k 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 | 16.7k views
12,783 questions
183,442 answers
172,219 comments
4,824 users