1-11 Exercise 3: Prefix of a string

0 like 0 dislike
9k 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 | 9k 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:172.70.80.232
©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 | 13.1k 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 | 8.8k 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 | 12k views
12,783 questions
183,442 answers
172,219 comments
4,824 users