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

 

[Exam] đã hỏi trong Final Exam
ID: 42299 - Xem được từ: 2018-01-17 14:00 - Hiệu lực đến: Không giới hạn
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Hidden content!
*  * *     ***  * 
*  ** *      **  * * 

int main()
{
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    * **  **  *** else
* ** * * *  * *  ***   *  * * ***  * is a prefix of ** *** *    *
      *      * }
  ****   *  ** return 0;
}
trả lời bởi (-258 điểm)
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0 0
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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0 0
Case 0: Wrong output
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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0 0
Case 0: Correct output
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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0 0
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
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0 0
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
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0 0
Case 0: Wrong output
Case 1: Correct 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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0 0
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
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0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
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0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
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Hidden content!
  **      **    **
** *      *********   
int main()
{
  **** *    ***  * ap;
 **  *****  **     *** *      ****   ** *   * || ap=a)
  *  * *  **    ** * *  *  * *    * **  *  is a prefix of abcde\n");
*  ** *** ****  *
   * ** ***
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 **  * ** ** * * * * **  **** **  *  ** *  * **** **  * * **    ** ** **    ** ****** *  * 0;
 *****   *   *** *  * *  **    **  *  ****  * ***** ** * * * * * * ***  **  *   
  
trả lời bởi (-167 điểm)
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
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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
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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
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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
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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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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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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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Hidden content!
*   * *  **** *  *  *  
** *  ** ** **  ** * 

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

int test(char p[],char s[],int pl, int sl)
{
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*          * * ********
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}


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





}
trả lời bởi (-336 điểm)
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Case 0: Correct output
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Case 0: Correct output
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Hidden content!
#include<stdio.h>
#include<string.h>
int main()
{
 * *** *    *** *  *   * *       a[99],b[99];
    int l,i;
* ** *  *** *   *  * * *  ***  * * *   * **
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 **     * **** *   **    ** * *
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    {
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** *  * * **   * *   **   * **  **   *   *    *    *
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*  * * ******  *  * ***  ****     *        **    * * ******* *  *******   **   *  
* *   *   *   * *  * ** *** *** **  * **         * ** 
 **  **  ** **    **   * ***   **    * *** * ****   * **
* *     *  *** *   * ****  * *** ***  **** **** ****  * *
** *  *  ***  * *  *  *    ***   * * *  *  **     *  *  * * ****  *  * * * *  **   *** ****** *  **  not a prefix of %s",a,b);
 *    ** * **  *****  *       * ***   * *   * **  ***** *** * ** *  *** *  *   *
 ** *   ** **  * **** **** **** ** *     * *  *  ****** *  *  
    }


}
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Hidden content!
#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])
{
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** ***  ******* ****  *  ** count=0;
***** **  ** ***   **  *  len;

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  **   *    *     *   * 
 *    *   ***** ** *  ** *** **** * ***** ** * * *  * * * * * 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;
}
trả lời bởi (-193 điểm)
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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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Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
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Hidden content!
 **  * ***  * *  *** * *
*       * * *   * * * ** 

int *** 
{
  *       ***    **  **** ****  ** * *    *  no idea, I    **   even do it in the * *   **  *** * * 
    ** *   * * *   ** **** 0;
}
trả lời bởi (-168 điểm)
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Hidden content!
#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);

  *   *** * *  *     *   * * 

}
trả lời bởi (-74 điểm)
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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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0 0
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);
             ^
đã bình luận bởi (4.3k điểm)
0 thích 0 k thích 
Hidden content!
*  * *   *** * *  ** 
      *   ** * * *****

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

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

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

  *         *  *  * ** 

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

}
trả lời bởi (-66 điểm)
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");
                                 ^
đã bình luận bởi (4.3k điểm)
0 thích 0 k thích 
Hidden content!
   *  ** *** *  
   *** * ** ** * * **

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

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

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

*  *    ** ***  * ** *   * ***  * 0;
}
trả lời bởi (-233 điểm)
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");
             ^
đã bình luận bởi (4.3k điểm)
0 thích 0 k thích 
Hidden content!
 ***    * **   **  ***  * 
*  * * *     * **   * 
int main (){
char       ****
char *  **** **
*  ***    *** * *    *    *   
*     ***   ** ***   ** ******** ** 
 ***    ***  **  ** ** *  *** ** *  
* **   * **  * * *    *********  
  * **** **  *   *  
**       **  is a prefix of   **  * **** * *
}
else{
** * *** *  ** is not a prefix of %s    * *** * *  
}
* * 0;
}
trả lời bởi (16 điểm)
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);
         ^
đã bình luận bởi (4.3k điểm)
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