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