Final Exam 2 (20%)

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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 分類:Final Exam |
ID: 42299 - 從幾時開始: 2018-01-17 14:00 - 到幾時結束: 無限制
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 **** ** **** ****** *
* * ***  *     *    * 

int main()
{
** *  **  * ****  char *  * * *
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**** *     *  *    * **     *** }
**  *  ** * 
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**  ***  * *   else
**** * * ***  ***  * *  **   * * *  *  is a prefix of  * *  * ****
** * * *    * }
 *  ***    ****  return 0;
}
最新回答 用戶: (-258 分)
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prog.c: In function 'main':
prog.c:8:11: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[10]' [-Wformat=]
   scanf("%s",&a);
           ^
prog.c:9:11: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[10]' [-Wformat=]
   scanf("%s",&b);
           ^
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Case 1: Wrong output
Case 2: Wrong output
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0 0
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
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Case 1: Wrong output
Case 2: Correct output
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0 0
prog.c: In function 'main':
prog.c:10:6: warning: implicit declaration of function 'stlen' [-Wimplicit-function-declaration]
   if(stlen(b)>strlen(a))
      ^~~~~
/tmp/ccnE3ufV.o: In function `main':
prog.c:(.text+0x5b): undefined reference to `stlen'
collect2: error: ld returned 1 exit status
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Case 1: Correct output
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Case 0: Correct output
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Case 1: Wrong output
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0 0
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Case 1: Wrong output
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* ** ** ***  ***** * 
 * *   ** *   **   * *
int main()
{
 ********    ap;
  * *    **             **** *  *  *    || ap=a)
* **  ** * * *   ** *    *  *    * **  *  is a prefix of abcde\n");
** ***  * ** *  ***
**     *   *    
  * ** *     *      **** *** ******** is not a prefix of abcde");
   *   *** ** * *  **   ** **  *** *** ***  * **  ***         *  **  0;
***   ** *  *** *** ***** *   * *  ** ** **  * ***      **  ****** * * ***
  
最新回答 用戶: (-167 分)
0 0
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 用戶: (4.3k 分)
0 0
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 用戶: (4.3k 分)
0 0
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 用戶: (4.3k 分)
0 0
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 用戶: (4.3k 分)
0 0
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:12:12: error: expected declaration or statement at end of input
            }
            ^
發表於 用戶: (4.3k 分)
0 0
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:12:12: error: expected declaration or statement at end of input
            }
            ^
發表於 用戶: (4.3k 分)
0 0
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:12:12: error: expected declaration or statement at end of input
            }
            ^
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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++)
  *    ** ******* ** ***  ** 
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* *** *   *   * * ********* *   ** * *   ** *  **  **   *
** *  *  *  *     **  * ** **  *  *  **  * ***   *** **  ****** **     ** *** ** * 
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** *  ** ** ** * * *** * *  * * ***** **** ** * * ****** * * **  *  *   **** *** *  **** **  * * **   *    *  * **  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 用戶: (-336 分)
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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 用戶: (-255 分)
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Case 1: Wrong output
Case 2: Wrong output
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#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 用戶: (-193 分)
修改於 用戶:
0 0
prog.c: In function 'main':
prog.c:45:15: warning: format '%[^
   ' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%[^\n]*c%",&a);
               ^
prog.c:45:20: warning: spurious trailing '%' in format [-Wformat=]
     scanf("%[^\n]*c%",&a);
                    ^
prog.c:46:15: warning: format '%[^
   ' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%[^\n]*c%",&b);
               ^
prog.c:46:20: warning: spurious trailing '%' in format [-Wformat=]
     scanf("%[^\n]*c%",&b);
                    ^
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0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
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內容已隱藏
**   **         *    ***
 **** *     *        

int **** 
{
*** **  **  *** ** *  *   * * ** *******  * no idea, I  **   even do it in the ** * * **  ***
**  ** **    * *  ** **   *   ** 0;
}
最新回答 用戶: (-168 分)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
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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 用戶: (-74 分)
修改於 用戶:
0 0
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.
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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__;
              ^~~~
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prog.c: In function 'main':
prog.c:14:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[10]' [-Wformat=]
     scanf("%s",&p);
             ^
prog.c:15:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[10]' [-Wformat=]
     scanf("%s",&s);
             ^
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內容已隱藏
**  ** * **  **
    * ** * *  ** 

int main()
{
 **** ***  * length1, * *    c;
  * ***    a[100];
 * *  * * * b[100];
*  *    ** d[100];

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

  *  *     * ***

 ***  *      *    *    * **

 ****  ******   
* * *  *  * 
*    *      ****   * *  **   is a prefix of  ****   
*  ** 
   ** *  *** **  *
  ** *  
***** ***  ***  * * is not a prefix of   * **  ***
**  ***** 

}
最新回答 用戶: (-66 分)
0 0
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");
                                 ^
發表於 用戶: (4.3k 分)
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內容已隱藏
*  *    * *       * * * 
**    * **  * *  ******

int main()
{
* * ****  * ** * *    * ***    * str;
**** * *   ***  * **** *  *   * i, p, s;

  *    ******** * *  *** * * * * **   **   * **  &p, &s);

* **** ***** *   * **** *   (i<=0; &p; i++);
  *** *  **    ***** **** ***
** **   * * ** * * ** *   * ** * *   * *  *   &p);
  *      * ***** *** ** *** *  *       *
 *****   *** *   *  **  *
  *  ** *   * * *     ** **   

* * * * ****** *** *   ***  * 0;
}
最新回答 用戶: (-233 分)
0 0
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");
             ^
發表於 用戶: (4.3k 分)
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內容已隱藏
   *    ***    *  * *    
** *   * *** ******* *
int main (){
char    *******  
char   *  * 
*** **  ** ** *****  ** ** *
*  * *** * ****             *
*  ****    ****       * ** *** *  **
 * **  *  **  *  *   *   ** 
*****  **   **   **    ***
  ****  *  *   is a prefix of **   *** ***  ** * 
}
else{
 ****  *      * is not a prefix of %s   ***    ** *** 
}
 ** * 0;
}
最新回答 用戶: (16 分)
0 0
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);
         ^
發表於 用戶: (4.3k 分)
頁:
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