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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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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*  *   **     **** * * *****   * ****** is not a prefix of abcde");
  ***** *     *    ** * * *   **   *** * *  * * * ** * *  *******  **** ** ***** * 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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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
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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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*  * *** ***  ***  * *  len;

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


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

   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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Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
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Case 0: 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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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");
             ^
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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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