Final Exam 2 (20%)

Question

17.3k 瀏覽

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

[考試] 最新提問 1月 16, 2018 分類:Final Exam |
ID: 42299 - 從幾時開始: 2018-01-17 14:00 - 到幾時結束: 無限制
標籤修改 1月 16, 2018 用戶:thopd | 17.3k 瀏覽

37 個回答

頁:

coach · Answer 1 · 2018-01-18 18:38:34

內容已隱藏
* * *** *** * ** * 
    **  * **     *** *  

int main()
{
 * * ***     char  * * * 
  ** **   * **  int i,c=0;
* * *  *      *    *****   *    *   ** ***   ** * **  
  ** *     **     *     * * * *         ** * * * 
** * **** *  ** *  ** *** * ***** * *** 
****   * *    * {
 ** *****  *   *   **  *   *   
****  ** ****      ** *   **** {
**      *     *  **  * ***   * *   **  *     ** **** * * *  * *  
**  *  *  *  *  *   * *  *          *    **   * * * **  *  {
**   * *               * *   *    *** c=0;
** ***     ******** *  *  *  *  ** **  **   ** *     *   *    *    }
*  * * ** *   * *   * * * **  *  *  *  ** else    *** *  * * *  *       * 
 *** ** * **** ** *    ** ** * ** * * ** *  ** *** *  * **  {
 ** **    * * ** * * ** **** **    **  * * *    * *****  *  ***    * * * *  *    c++;
** *   ***  ***     *** **  ** *   **** *** *  *  *   }
* * * * ***** **** * ** *  ** }
** *   **  *   * * 
 **   **   *** *   if(c==0)
****  ** *****    ***     * *       ***   *    is not a prefix of * * ***    * 
*   ** **  * ** ** else
    ****  * *      *  *   *  * **  * *  * ** * *** is a prefix of  ** **  ** * 
 **   * *     }
*** * *     ***   return 0;
}

最新回答 1月 18, 2018 用戶: coach (-258 分)
修改於 1月 18, 2018 用戶:coach

112233 · Answer 2 · 2018-01-17 17:52:12

prog.c: In function 'main':
prog.c:6:10: error: 'a' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
          ^
prog.c:6:10: note: each undeclared identifier is reported only once for each function it appears in
prog.c:6:17: error: 'z' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
                 ^
prog.c:10:12: warning: missing terminating " character
     printf("bc is not a prefix of abcde);
            ^
prog.c:10:12: error: missing terminating " character
     printf("bc is not a prefix of abcde);
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
prog.c:11:12: error: expected expression before 'return'
            return 0;
            ^~~~~~
prog.c:12:12: error: expected ';' before '}' token
            }
            ^
prog.c:12:12: error: expected declaration or statement at end of input

發表於 1月 17, 2018 用戶: The Judge (4.3k 分)

prog.c: In function 'main':
prog.c:6:10: error: 'a' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
          ^
prog.c:6:10: note: each undeclared identifier is reported only once for each function it appears in
prog.c:6:17: error: 'z' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
                 ^
prog.c:10:12: warning: missing terminating " character
     printf("bc is not a prefix of abcde);
            ^
prog.c:10:12: error: missing terminating " character
     printf("bc is not a prefix of abcde);
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
prog.c:11:12: error: expected expression before 'return'
            return 0;
            ^~~~~~
prog.c:12:12: error: expected ';' before '}' token
            }
            ^
prog.c:12:12: error: expected declaration or statement at end of input

發表於 1月 17, 2018 用戶: The Judge (4.3k 分)

prog.c: In function 'main':
prog.c:6:10: error: 'a' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
          ^
prog.c:6:10: note: each undeclared identifier is reported only once for each function it appears in
prog.c:6:17: error: 'z' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
                 ^
prog.c:10:12: warning: missing terminating " character
     printf("bc is not a prefix of abcde);
            ^
prog.c:10:12: error: missing terminating " character
     printf("bc is not a prefix of abcde);
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
prog.c:11:12: error: expected expression before 'return'
            return 0;
            ^~~~~~
prog.c:12:12: error: expected ';' before '}' token
            }
            ^
prog.c:12:12: error: expected declaration or statement at end of input

發表於 1月 17, 2018 用戶: The Judge (4.3k 分)

prog.c: In function 'main':
prog.c:6:10: error: 'a' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
          ^
prog.c:6:10: note: each undeclared identifier is reported only once for each function it appears in
prog.c:6:17: error: 'z' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
                 ^
prog.c:10:12: warning: missing terminating " character
     printf("bc is not a prefix of abcde);
            ^
prog.c:10:12: error: missing terminating " character
     printf("bc is not a prefix of abcde);
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
prog.c:11:12: error: expected expression before 'return'
            return 0;
            ^~~~~~
prog.c:12:12: error: expected ';' before '}' token
            }
            ^
prog.c:12:12: error: expected declaration or statement at end of input

發表於 1月 17, 2018 用戶: The Judge (4.3k 分)

hubertyeh · Answer 3 · 2018-01-17 17:38:48

內容已隱藏
**     ** *  ** *   ****
 * *** * *   *  ***  *

char p[1000],s[1000];
int i,pl,sl;

int test(char p[],char s[],int pl, int sl)
{
**  * * *** * * ***   ** **  ** ***   * i<pl; i++)
**   ***   ******* ****  *
* * *** *  * *** ** * *** **    ** * * * *    *  * * **   * (p[i]==s[i])
*** * *** ***  *  * *****  * *    * * * *  *** *  *
** *** ***** * *  ****  *** * ** * *  *  ***  ****    **   *  *   * * *  ***    *  **    * *
    ******* * *  ***   ******  ** *  * **  *** * *   *** **** ***  *** * * *   *    
*  **    **** ******      * *** *  *  *** ** *  *** *  *  ***  * **   * ****** * ****  * * * ** **    * * ** **  1;
    *******  ***   ******      ****  ****   **    **** ****   ** **  **  * ***** *** ** ** *
   **       **  *  *  *   **    ****  **   ****   *   * * *
 *   ** ****** *     *** ** *  *  *  * * ** ** * *** * *  * *  if(p[i]!=s[i])
  * * * *    ****    * * **   *   **      * *   *** 
  *** *** ** * *** *  **** *    *   ****     **     *   * ** **  *  ******   * 0;
 * * * ********  **** * *       **  ** * ***    *  *
 ** **       * * * ******  *
}


int main()
{
 ** ** ** **   **
   *    * *  * ***
*****  **  ",p);
**** *****   *     
**   ** *  *   *   *

sl=strlen(s);
pl=strlen(p);


  *****     && pl<sl)
{

* **** *  ****   *   *  *      *  is a prefix of %s",p,s);
}else
{
printf("%s is not a prefix of %s",p,s);
}





}

最新回答 1月 17, 2018 用戶: hubertyeh (-336 分)

rick · Answer 4 · 2018-01-17 16:29:44

內容已隱藏
#include<stdio.h>
#include<string.h>
int main()
{
** * **  *  *  *  *   ****  a[99],b[99];
    int l,i;
*   ******  ** *** *** * *   ***  **
*     **    ****  *** * * *  *  *  **  
  ** *    **    *   *** *** **  *** *
** ** ****  ** *** * ** ** **  * *  **** ***
    {
* * ***     *   ****     *** ***  **     * * *  * *****  *
******  * ** ** **   *  *  * ***** *  *  *** * *       *  
***  **     ******* ***   *** **    * *   * * ****** ** *   *   ** *** *   * ****  *  *   *  * * **  a prefix of %s",a,b);
**  *   * *       ** *** ***   *** *   *****    **  **  ******   * * *   **  **  *****  *
* * *      **  ***  * **     * ** *  * *****   *   *  * *
 **   **  *** * ** ****  *** *   *   *****  * * *****
  **** * **  ** * * * **      *  *    **  *** *** **
 ** **   * * *     **     *  ** *  *   *   ** ***   **** *  *** * * * ***  ** *   **   ** ** not a prefix of %s",a,b);
* ***** ** * * * ***  ***   *   ** * *  **   * ****   *   ** ** *  *  * ***  * **   
 * **    * * **   *   *   *  **  *  ******* *   * *  *
    }


}

最新回答 1月 17, 2018 用戶: rick (-255 分)
修改於 1月 17, 2018 用戶:rick

Diyiel · Answer 5 · 2018-01-17 16:27:31

內容已隱藏
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

int prefix(char a[100],char b[100]);


int prefix(char a[100],char b[100])
{
      ********     *    ** * i;
*** ****   ****  * *    *  *** count=0;
 ** ** ****   *** * *  **  *  len;

*  ****  *   *** * * *****    *  ***** **

   *****   **   * * *  ** * * *  ** * *    ****
**** *  **   **    *   * 
*** *   ***********  * ***** **          ** *   *     **  *
***   * *   ******  ** *** ****  *    * * *  *     
* ** ******* **** ***** **  ** * * * ***       ****   * * * *******   ***  *** ***  ***  ** *
 ***  ** **   ***     * ** *** ** * *  ** * **** **
  * *** *   ***** **      ** ** 


   *  *  * *   ** *   *  *** * *** 
** *          ** **   *    * *
 *   **   *  *  *  *****  * *** **  **  ** * *  ***  1;
  *     *****      **  *****  
**  *  **   ** * * *  * *** *

   return 0;
}


int main()
{
     * * **** *  *    *** * * a[100];
 ****        **  ****   * *** b[100];


  ** * *  ****  ** * * *   * * *** *   * **************  **
** * ****     ** *   ** * *   *** ** ** * *** *** * * **** 

 ***** ***** *       **  * * **  ***  *** 
  **     * ** ** * * *  ***   ** * **       *

* *   *****  **    * *   ***** ***  * *

 {
*  * *  *  **  *    **  *  ** ***     *   ***   *** *  ***   ******* is a prefix of %s",a,b);
   *      *    * ** *   *** **   
* *** * *  **** * ** *** *   *  **  
 *   **   * *    *  *  *** *  
***  *  **** ***   **   * ** * * ** *   *  ***  *     ***** *      ****  is not a prefix of %s",a,b);
* *   * *******   ***  * *** ** * 


*** * ** *  * ***  *****   0;
}

最新回答 1月 17, 2018 用戶: Diyiel (-193 分)
修改於 1月 17, 2018 用戶:Diyiel

410421322 · Answer 6 · 2018-01-17 16:12:58

內容已隱藏
#include  ***      ** * ** 
#include ** *    *  * * *
#include  ** * ** **   

int pref(char[],char[]);

int main(){

  *  ***   * **    * *  ***  p[10],s[10];
* **    ** * ** ** ** *    * * num;

*   *    *  **** **  * *    * * *
 *  ** * ***     **  * *   ***      *
  *       ** **  **    *  *  ******* * * *  *  *  * ****
   *    * *** *  *** * ** ** *   *** *  **   * **  *  * * 

 ***** *   ***  ***** *** **  * = pref(p,s);

***  *  *  ** ***** **  ** *      * 
*    ** *      ** * * *  **        ** ** ****   *  *  * **   **  is a prefix of %s",p,s);
** *  *   ****  **    * ***  ****
 *  * *     ***  * *    *  *  *** * ** ** **  *  ** * **  ******    *  is not a prefix of %s",p,s);


 return 0;
}

int pref(char p[30],char s[30]){
 ****** **    **   *  **    ** i;

****    *    * * *** *** ***    ***    *  ** *
*  **** **   ** ****   ** * ***   *   *** ** ***  *  ****** * *      *    ***** * ***  *  * **    ***     
*    ****   **     * * *  * * *** ***    * ******   ***    ***** * ** * ***  ****  * *  *    * **** *  * *** is a prefix of %s",p,s);
*  * * **   *** ****  *** *******    ***  ****   * * *   
 ** ****  * **      *   ** ******* *  ***  **  ** * ***  *  **   *   * * *  *  *  *     ***** * *  *  *  * * *  * is not a prefix of %s",p,s);

**       * ** *   **** ***

}

最新回答 1月 17, 2018 用戶: 410421322 (-74 分)
修改於 1月 17, 2018 用戶:410421322

prog.c: In function 'main':
prog.c:12:5: 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:13:5: 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__;
              ^~~~
/tmp/cc0tBG5r.o: In function `main':
prog.c:(.text+0x1f): warning: the `gets' function is dangerous and should not be used.

發表於 1月 17, 2018 用戶: The Judge (4.3k 分)

prog.c: In function 'main':
prog.c:10:13: error: stray '#' in program
     int num;#include <stdio.h>
             ^
prog.c:10:14: error: 'include' undeclared (first use in this function)
     int num;#include <stdio.h>
              ^~~~~~~
prog.c:10:14: note: each undeclared identifier is reported only once for each function it appears in
prog.c:10:23: error: 'stdio' undeclared (first use in this function)
     int num;#include <stdio.h>
                       ^~~~~
prog.c:14:1: error: expected expression before 'int'
int pref(char[],char[]);
^~~
prog.c: In function 'main':
prog.c:23:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[10]' [-Wformat=]
     scanf("%s",&p);
             ^
prog.c:24:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[10]' [-Wformat=]
     scanf("%s",&s);
             ^
prog.c: In function 'main':
prog.c:51:5: 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:52:5: 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__;
              ^~~~

發表於 1月 17, 2018 用戶: The Judge (4.3k 分)

潘恆安 · Answer 7 · 2018-01-17 15:50:02

prog.c: In function 'main':
prog.c:11:10: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
  scanf("%s",&a);
          ^
prog.c:12:10: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
  scanf("%s",&b);
          ^
prog.c:24:11: warning: format '%s' expects a matching 'char *' argument [-Wformat=]
  printf("%s is not a prefix of %s,a,b");
           ^
prog.c:24:33: warning: format '%s' expects a matching 'char *' argument [-Wformat=]
  printf("%s is not a prefix of %s,a,b");
                                 ^

410421323 · Answer 8 · 2018-01-17 15:35:28

prog.c: In function 'main':
prog.c:12:7: error: expected '(' before '{' token
     if{}
       ^
prog.c:13:12: warning: too many arguments for format [-Wformat-extra-args]
     printf("abc", &p);
            ^~~~~
prog.c:14:13: warning: format '%d' expects a matching 'int *' argument [-Wformat=]
     scanf("%d");
             ^

810532009 · Answer 9 · 2018-01-17 15:21:35

prog.c: In function 'main':
prog.c:7:9: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
scanf("%s",&string1);
^
prog.c:9:9: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
scanf("%s",&string2);
^

Final Exam 2 (20%)

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