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
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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
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!
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  ** * **  *  *   **** *
int main()
{
**  ** ** * ***   * ap;
 *   *   * * * *** *     *   ** *** *  || ap=a)
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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
            }
            ^
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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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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{

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}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 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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 ** * *  *   * * **** *** ****     ***   *
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    {
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 ***  *  ***  * **   **  * ** *** ** ** * *  ** * ** ** ***   * *  * * *****  ***   *  * * ** *  a prefix of %s",a,b);
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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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   *** **  ****  *  **** *  * *
 * ***** **    **   ***   *    ****  ** *     ***    1;
*  * * ***    **   * ** *
* * ** *    * ***    *** 

   return 0;
}


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


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

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

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

 {
** **  **** **  ** *    *  ***     * *    ** *  * *  **  *     **  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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Case 0: Wrong output
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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)
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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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