1-11 Exercise 3: Prefix of a string

0 like 0 dislike
9.2k 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 | 9.2k 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:172.69.130.52
©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 | 13.3k 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 | 9.1k 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 | 12.3k views
12,783 questions
183,442 answers
172,219 comments
4,824 users