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!
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**** ** ***** *  ** * 

int main()
{
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** ***  ****  * 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
đã bình luận bởi (4.3k điểm)
0 0
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
đã bình luận bởi (4.3k điểm)
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
đã bình luận bởi (4.3k 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: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!
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   ***   **   ** **    ** 

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

int test(char p[],char s[],int pl, int sl)
{
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int main()
{
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sl=strlen(s);
pl=strlen(p);


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{

 * * **  **** ***  ***  **  *** * 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
Case 1: Wrong output
Case 2: 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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  * ****   *     **  **     **  * *   **  **  ***   * ** ****   * *  * ** *****  *  ******   * ** 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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 **   * **        *  *        **  **   ** *      **
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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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0 0
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);

 *     ***   * *** *   * 

}
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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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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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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)
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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)
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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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