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:108.162.216.131
©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