1-11 Exercise 3: Prefix of a string

0 like 0 dislike
8.8k 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 | 8.8k 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:172.69.59.98
©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 | 12.8k 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 | 8.7k 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 | 11.9k views
12,783 questions
183,442 answers
172,219 comments
4,824 users