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