1-11 Exercise 3: Prefix of a string

0 like 0 dislike
6.5k 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 | 6.5k 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:172.71.255.61
©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 | 9.3k 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 | 6.3k 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 | 8.6k views
12,783 questions
183,442 answers
172,219 comments
4,824 users