1-11 Exercise 3: Prefix of a string

0 like 0 dislike
6.2k 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 | 6.2k 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:172.70.130.195
©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 | 8.8k 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 | 5.9k 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 | 8.1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users