1-11 Exercise 3: Prefix of a string

0 like 0 dislike
15k 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 | 15k 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 | 21.5k 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 | 14.1k 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 | 19.5k views
12,783 questions
183,442 answers
172,219 comments
4,824 users