1-11 Exercise 3: Prefix of a string

0 like 0 dislike
12.3k 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 | 12.3k 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:104.23.197.94
©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 | 17.9k 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 | 11.6k 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 | 15.9k views
12,783 questions
183,442 answers
172,219 comments
4,824 users