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:172.69.59.235
©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