1-11 Exercise 3: Prefix of a string

0 like 0 dislike
8.8k 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 | 8.8k 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:172.69.214.39
©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 | 12.8k 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 | 8.7k 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 | 11.9k views
12,783 questions
183,442 answers
172,219 comments
4,824 users