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:172.69.58.138
©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