1-11 Exercise 3: Prefix of a string

0 like 0 dislike
7.3k 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 | 7.3k 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:172.69.58.5
©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 | 10.6k 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 | 7.1k 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 | 9.7k views
12,783 questions
183,442 answers
172,219 comments
4,824 users