1-11 Exercise 3: Prefix of a string

0 like 0 dislike
7.3k 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 | 7.3k 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:172.70.130.24
©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 | 10.6k 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 | 7.1k 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 | 9.7k views
12,783 questions
183,442 answers
172,219 comments
4,824 users