1-11 Exercise 3: Prefix of a string

0 like 0 dislike
7k 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 | 7k 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:172.69.17.22
©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 | 10.1k 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 | 6.6k 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 | 9.2k views
12,783 questions
183,442 answers
172,219 comments
4,824 users