1-11 Exercise 3: Prefix of a string

0 like 0 dislike
13.1k 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 | 13.1k 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:104.23.197.65
©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 | 19.2k 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 | 12.5k 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 | 16.7k views
12,783 questions
183,442 answers
172,219 comments
4,824 users